WO2016078551A1 - 一种资源分配方法、设备及系统 - Google Patents

一种资源分配方法、设备及系统 Download PDF

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Publication number
WO2016078551A1
WO2016078551A1 PCT/CN2015/094591 CN2015094591W WO2016078551A1 WO 2016078551 A1 WO2016078551 A1 WO 2016078551A1 CN 2015094591 W CN2015094591 W CN 2015094591W WO 2016078551 A1 WO2016078551 A1 WO 2016078551A1
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Prior art keywords
resource
vehicle terminal
link
information
control entity
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PCT/CN2015/094591
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English (en)
French (fr)
Inventor
唐纪晔
冯媛
周海军
郭宣羽
房家奕
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电信科学技术研究院
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Publication of WO2016078551A1 publication Critical patent/WO2016078551A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to the field of mobile communications technologies, and in particular, to a resource allocation method, device, and system.
  • Vehicle active and secure vehicle networking communication system is based on wireless communication technology to obtain information of vehicles and roads. Through vehicle and vehicle information interaction and sharing, intelligent cooperation and cooperation between vehicles and infrastructure can be realized to optimize the utilization of system resources. Improve road traffic safety and ease traffic congestion.
  • the above-mentioned vehicle networking communication system has high requirements for delay.
  • the existing self-organizing network technology using short-distance communication can meet the delay requirements of the vehicle-network communication system, but the communication link is inefficient and the communication function is not easy to expand.
  • 3GPP The 3rd Generation Partnership Project, third generation
  • 3GPP D2D The 3rd Generation Partnership Project Device-to-Device
  • FIG. 1 shows two major functions of D2D Discovery and D2D Communication included in the 3GPP D2D technology.
  • a link (D2D link) that directly communicates between the device and the device and a link (D2N (Device-to-Network)) that communicates between the device and the network node are defined.
  • the UE User Equipment
  • participating in the D2D Discovery/Communication is divided into a UE (D2D transmitting UE) that transmits a D2D Discovery/Communication message and a UE (D2D receiving UE) that receives a D2D Discovery/Communication message sent by the D2D transmitting UE.
  • broadcast messages are mainly used at present.
  • the existing solution is to use the D2D resource control entity to manage the allocation of D2D link resources of the vehicle terminals in one or more cells, but the D2D resource control entity manages the adjacent edge portions between the regions.
  • the interference problem of the neighboring area may occur.
  • the method of inter-area interference coordination designed by the LTE (Long Term Evolution) system is a solution.
  • the density of the vehicle terminal varies at different locations and time periods, and is uneven, affecting the performance of inter-region interference coordination.
  • the D2D resource control entity obtains information of a certain area, and the D2D resource is adopted by referring to the method for inter-region interference coordination designed by the LTE system.
  • Policies associated with resources of the cellular network may limit the use of link resources and may not fully utilize D2D link resources.
  • the existing D2D resource allocation scheme has the problem that the inter-region interference coordination performance is poor and the D2D link resources cannot be fully utilized.
  • the embodiments of the present invention provide a resource allocation method, device, and system, which are used to solve the problem that the existing D2D resource allocation scheme has poor inter-region interference coordination performance and cannot fully utilize D2D link resources.
  • a resource allocation method includes:
  • the D2D link resource is allocated to the vehicle terminal that sends the resource allocation request;
  • the related information includes current location information of each vehicle terminal and D2D link resource information used, the acquisition information area including the first resource management area and a first multiplexing area, the first multiplexing area And including an area within a multiplexing distance of at least a preset D2D link resource outside the first resource management area.
  • the acquiring information area of the first D2D resource control entity includes not only the first resource management area managed by the first D2D resource control entity but also the first multiplexing area, due to the complex D2D link resource
  • the distance is a distance at which resource multiplexing can be performed. Therefore, by using the related information of the vehicle terminal in the first multiplexing area, it is possible to effectively avoid assigning a D2D link to other vehicle terminals for the vehicle terminal that transmits the resource allocation request.
  • the resource has D2D link resources with large interference, and this resource allocation scheme has nothing to do with the density factors of the vehicle terminal at different locations and time periods, which are varied and uneven. Therefore, the inter-region interference coordination performance is better;
  • the resource allocation scheme does not limit the use of D2D link resources, and therefore, the D2D link resources can be fully utilized.
  • the related information of each vehicle terminal in the acquisition information area is determined according to the following steps:
  • the related information of each vehicle terminal in each of the obtained overlapping areas and the related information of each vehicle terminal in the first resource management area are used as information on the respective vehicle terminals in the acquired information area.
  • the related information further includes an identifier of a hop neighboring vehicle terminal of each vehicle terminal; and the resource allocation request further carries a hop neighboring vehicle of the vehicle terminal The identity of the terminal;
  • the current location information carried in the resource allocation request and the determined each of the vehicles And the related information of the terminal, where the D2D link resource is allocated to the vehicle terminal that sends the resource allocation request including:
  • the method further includes:
  • the identifier of the vehicle terminal that sends the resource allocation request, the used D2D link resource, the identifier of the one-hop neighboring vehicle terminal carried in the resource allocation request, and the current location information are correspondingly stored.
  • the method further includes:
  • the related information of each vehicle terminal in the determined first resource management area is updated by using the reported current location information and/or the identifier of the one-hop neighboring vehicle terminal.
  • the method further includes:
  • the method further includes:
  • N Determining N vehicle terminals in which the used D2D link resource information collides according to the current location information of the vehicle terminal that reports the D2D link resource information that collided and the D2D link resource information that collides, the N is greater than An integer of 1;
  • the second aspect is a resource allocation method, including:
  • the related information includes current location information of each vehicle terminal and D2D link resource information used
  • the acquisition information area includes a resource management area and a first multiplexing area of the D2D resource control entity, where the first The multiplexing area includes an area within a multiplexing distance of at least a preset D2D link resource outside the resource management area.
  • the information acquisition area of the D2D resource control entity includes not only the resource management area managed by the D2D resource control entity but also the first multiplexing area, and the multiplexing distance of the preset D2D link resource is The distance for resource multiplexing is performed, and therefore, the vehicle terminal for transmitting the resource allocation request can be effectively avoided by using the related information of the vehicle terminal in the first multiplexing area.
  • the related information further includes an identifier of a neighboring vehicle terminal of each vehicle terminal; the method further includes:
  • the method further includes:
  • the method further includes:
  • a first D2D resource control entity includes:
  • a first determining module configured to determine related information of each vehicle terminal in an acquisition information area of the first D2D resource control entity, where the related information includes current location information of each vehicle terminal and used D2D link resource information, Acquiring the information area including the first resource management area and the first a multiplexing area, where the first multiplexing area includes an area within a multiplexing distance of at least a preset D2D link resource outside the first resource management area;
  • a receiving module configured to receive a resource allocation request sent by a vehicle terminal in a first resource management area of the first D2D resource control entity, where the resource allocation request carries current location information of the vehicle terminal;
  • a resource allocation module configured to allocate a D2D link resource to the vehicle terminal that sends the resource allocation request according to the current location information carried in the resource allocation request and the determined related information of each of the vehicle terminals.
  • the acquiring information area of the first D2D resource control entity includes not only the first resource management area managed by the first D2D resource control entity but also the first multiplexing area, due to the complex D2D link resource
  • the distance is a distance at which resource multiplexing can be performed. Therefore, by using the related information of the vehicle terminal in the first multiplexing area, it is possible to effectively avoid assigning a D2D link to other vehicle terminals for the vehicle terminal that transmits the resource allocation request.
  • the resource has D2D link resources with large interference, and this resource allocation scheme has nothing to do with the density factors of the vehicle terminal at different locations and time periods, which are varied and uneven. Therefore, the inter-region interference coordination performance is better;
  • the resource allocation scheme does not limit the use of D2D link resources, and therefore, the D2D link resources can be fully utilized.
  • the first determining module is specifically configured to determine, by using a second D2D resource control entity that manages D2D link resources of the first multiplexing area, respectively
  • Each of the second D2D resource control entities performs data interaction, and obtains information about each vehicle terminal in the overlapping area of the second resource management area of the second D2D resource control entity and the first multiplexing area;
  • the related information of each vehicle terminal in each overlapping area and the related information of each vehicle terminal in the first resource management area are used as related information of each vehicle terminal in the acquired information area.
  • the related information further includes an identifier of a hop neighboring vehicle terminal of each vehicle terminal; and the resource allocation request further carries a hop neighboring vehicle of the vehicle terminal The identity of the terminal;
  • the resource allocation module is configured to determine, according to the received identifier of the one-hop neighboring vehicle terminal and the determined information about each vehicle terminal, an actual three-hop of a current location of the vehicle terminal that sends the resource allocation request.
  • the D2D link resource used by each vehicle terminal within the distance selects one D2D link resource from the D2D link resources other than the D2D link resources used by each vehicle terminal within the determined three-hop distance, and the selected D2D chain
  • the road resource is allocated to the vehicle terminal that transmitted the resource allocation request.
  • the first D2D resource control entity further includes: a second determining module and a storage module;
  • the second determining module is configured to determine the allocated D2D link resource as a D2D link resource used by a vehicle terminal that sends the resource allocation request;
  • the storage module is configured to store, according to the identifier of the vehicle terminal that sends the resource allocation request, the used D2D link resource, the identifier of the first-hop neighboring vehicle terminal carried in the resource allocation request, and the current location information.
  • the receiving module is further configured to receive current location information reported by the vehicle terminal in the first resource management area and/or Or the identity of a neighboring vehicle terminal;
  • the first D2D resource control entity further includes: an update module, configured to update related information of each vehicle terminal in the determined first resource management area by using the reported current location information and/or the identifier of the one-hop neighboring vehicle terminal .
  • the D2D resource control entity further includes: a third determining module, a first selecting module, and a first switching module;
  • the third determining module is configured to determine to use the same D2D chain when determining, according to the reported current location information, that the distance between the vehicle terminals using the same D2D link resource is less than the multiplexing distance of the preset D2D link resource M vehicle terminals of road resources;
  • the first selection module is configured to select M-1 vehicle terminals from the determined M vehicle terminals;
  • the first switching module is configured to separately send the D2D to the selected M-1 vehicle terminals And a link resource switching command of the link resource, so that the vehicle terminal that receives the link resource switching command switches to the D2D link resource carried in the handover command, where the M is an integer greater than 1.
  • the receiving module is further used Receiving the collided D2D link resource information reported by the vehicle terminal in the first resource management area;
  • the D2D resource control entity further includes: a fourth determining module, a second selecting module, and a second switching module;
  • the fourth determining module is configured to determine, according to the current location information of the vehicle terminal that reports the D2D link resource information that collides, and the D2D link resource information that collides, determine that the used D2D link resource information collides with the N Vehicle terminals, the N being an integer greater than one;
  • the second selection module is configured to select N-1 vehicle terminals from the determined N vehicle terminals;
  • the second switching module is configured to separately send a link resource switching command carrying the D2D link resource to the selected N-1 vehicle terminals, so that the vehicle terminal that receives the link resource switching command is switched to the handover command.
  • Link resource of the carried D2D link resource is configured to separately send a link resource switching command carrying the D2D link resource to the selected N-1 vehicle terminals, so that the vehicle terminal that receives the link resource switching command is switched to the handover command.
  • a vehicle terminal includes:
  • a sending module configured to send, to the D2D resource control entity, a resource allocation request that carries current location information of the vehicle terminal;
  • a receiving module configured to receive a D2D link resource allocated by the D2D resource control entity, where the D2D link resource is determined by the D2D resource control entity according to the current location information and related information of each vehicle terminal in the acquired information region;
  • the related information includes current location information of each vehicle terminal and D2D link resource information used
  • the acquisition information area includes a resource management area and a first multiplexing area of the D2D resource control entity, where the first The multiplexing area includes an area within a multiplexing distance of at least a preset D2D link resource outside the resource management area.
  • the acquiring information area of the D2D resource control entity includes not only the resource management area managed by the D2D resource control entity but also the first multiplexing area, due to the preset D2D chain.
  • the multiplexing distance of the road resource is a distance at which the resource can be multiplexed. Therefore, by using the related information of the vehicle terminal in the first multiplexing area, the vehicle terminal allocated for transmitting the resource allocation request can be effectively avoided from being used with other vehicle terminals.
  • the D2D link resources have D2D link resources with large interference, and the resource allocation scheme has nothing to do with the density factors of the vehicle terminals changing at different locations and time periods, and therefore, the inter-region interference coordination performance is better; At the same time, since this resource allocation scheme does not limit the use of D2D link resources, the D2D link resources can be fully utilized.
  • the related information further includes an identifier of a neighboring vehicle terminal of each vehicle terminal; the vehicle terminal further includes:
  • a determining module configured to determine an identifier of a one-hop neighboring vehicle terminal of the vehicle terminal by detecting data of an adjacent vehicle terminal
  • the sending module is configured to send, to the D2D resource control entity, a resource allocation request that carries the current location information and the identifier of the determined one-hop neighboring vehicle terminal, so that the D2D resource control entity determines, according to the current location information that is carried, The identifier of the one-hop neighboring vehicle terminal and the related information of each vehicle terminal allocate D2D link resources.
  • the sending module is further configured to report current location information and/or identifier of a neighboring vehicle terminal to the D2D resource control entity. And causing the D2D resource control entity to update related information of each vehicle terminal in the determined resource management area according to the reported current location information and/or the identifier of the one-hop neighboring vehicle terminal.
  • the sending module is further configured to report the D2D resource control entity to the D2D resource control entity when detecting that the D2D link resource collides The collided D2D link resource information is generated, so that the D2D resource control entity sends a link resource switching command according to the collided D2D link resource information.
  • a fifth aspect is a resource allocation system, comprising: any one of the first D2D resource control entities and at least one of the foregoing vehicle terminals.
  • the acquisition information area of the first D2D resource control entity includes not only the first resource management area that it manages, but also the first multiplexing area, and therefore, utilizes
  • the related information of the vehicle terminal in the first multiplexing area can effectively prevent the vehicle terminal that transmits the resource allocation request from allocating D2D link resources that have a large interference with the D2D link resources used by other vehicle terminals, and the like
  • the resource allocation scheme is independent of the density and non-uniform density factors of the vehicle terminal at different locations and time periods. Therefore, the inter-area interference coordination performance is better.
  • this resource allocation scheme does not limit the use of D2D link resources. Therefore, the D2D link resources can be fully utilized.
  • the network side device provided by the embodiment of the present invention includes: a processor and a memory;
  • the processor is configured to read a program in the memory and perform the following process:
  • the vehicle terminal device provided by the embodiment of the present invention includes: a processor and a memory;
  • the processor is configured to read a program in the memory and perform the following process:
  • the entity is determined according to the current location information and related information of each vehicle terminal in the acquisition information area; wherein: the related information includes current location information of each vehicle terminal and used D2D link resource information, and the acquired information area
  • the resource management area and the first multiplexing area of the D2D resource control entity are included, where the first multiplexing area includes an area within a multiplexing distance of at least a preset D2D link resource outside the resource management area.
  • 1 is a schematic diagram of D2D discovery/communication of 3GPP D2D in the background art
  • FIG. 2 is a schematic structural diagram of a networked cellular D2D mode network according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of three-hop distance slot multiplexing according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a network structure in which a first D2D resource control entity is located outside a cellular base station according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a D2D link resource management area distribution according to an embodiment of the present disclosure.
  • FIG. 7 is a second schematic diagram of a D2D link resource management area according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic diagram of a resource allocation method on a terminal side according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a first D2D resource control entity according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a vehicle terminal according to an embodiment of the present invention.
  • FIG. 11 is a schematic diagram of a resource allocation system according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of another first D2D resource control entity according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of another vehicle terminal according to an embodiment of the present invention.
  • the present invention provides a resource allocation method, device, and system for solving the problem that the existing D2D resource allocation scheme cannot fully utilize the D2D link resources and the inter-area interference coordination performance is poor.
  • the following is a description of the self-organizing car network solution of the MS-Aloha technology and the resource allocation method of the car-network D2D using the cellular base station, which are the closest to the embodiment of the present invention.
  • the vehicle terminal selects an idle time slot by detecting the occupancy of the time slot.
  • the data transmitted by the vehicle terminal also includes some fields indicating the occupancy of the time slot, and the information of the detected time slot occupancy is released in the FI field, so that the surrounding vehicle terminals can obtain the relevant time. Gap occupancy information, avoid picking nearby cars The time slot that the terminal has selected.
  • a resource of a longer field needs to be set for the security mechanism in the payload field of each frame of data, which affects the efficiency of use of the radio resource.
  • the self-organizing car network can complete resource allocation and continuous updating quickly and efficiently also has certain risks.
  • the D2N link is a conventional wireless communication link in a cellular network, and the vehicle terminal should first establish this link with the system. Through the D2N link, the system allocates resources used by the D2D link to the vehicle terminals, enabling direct communication between the vehicle terminals.
  • a D2D resource control entity In the car network cellular D2D network, a D2D resource control entity is designed.
  • the D2D resource control entity may be configured in a cellular base station (such as an eNodeB (Evolved 3G Mobile Base Station)), or may be disposed in other network elements of the upper layer, or a separate network element may be disposed.
  • the D2D resource control entity in Figure 2 manages only vehicle terminals within each cell of a single eNode B.
  • the D2D resource control entity shall be able to obtain allocation information among D2D link resources in its own resource management area (one or more cells) from its eNodeB.
  • the D2D vehicle terminal periodically transmits the location information reported by the D2D resource control entity and the time slot of the data of the surrounding terminal, and the D2D resource control entity allocates the vehicle terminal according to the resource usage situation of the location of the D2D vehicle terminal.
  • a suitable D2D link resource is
  • the D2D resource control entity only obtains the same D2D link resource allocation as the coverage area and the slot occupancy information of the surrounding terminals, however, due to the link resources and the cellular used by the car network D2D
  • the link resources used by the network do not have a matching relationship, and the coverage and characteristics are also different.
  • the D2D resource control entity only obtains the same D2D link resource allocation information and the slot occupancy information of the surrounding terminals, the D2D resource control entity causes the allocation.
  • the possibility that the D2D link resources of the vehicle terminal collide with the D2D link resources used by other vehicle terminals increases, or resource conflicts with other vehicle terminals may occur very quickly.
  • the density of vehicle terminals varies and is uneven at different locations and time periods, and the performance of inter-region interference coordination is still poor.
  • the embodiment of the present invention provides a resource allocation method, in which the D2D resource control entity can obtain a relatively complete and comprehensive D2D link resource allocation or usage.
  • the more complete and comprehensive D2D link resource allocation or use situation is: the first resource management area of the D2D resource control entity and the D2D link resource allocation or usage in the first multiplex area, where the first multiplex area includes An area within a multiplexing distance of at least a preset D2D link resource outside the first resource management area.
  • the multiplexing distance of the preset D2D link resource is preset, and is determined according to a distance that the vehicle terminals can receive information from each other, and the D2D preset by any vehicle terminal in the first resource management area is determined.
  • the vehicle terminals outside the multiplexing distance of the link resources are capable of multiplexing the link resources used by the vehicle terminal.
  • the preset multiplexing distance of the D2D link resource may be a preset three-hop distance
  • the distance within one hop is the normal reception distance. If the vehicle terminal receives its own two-hop distance and other vehicle terminals use the same time slot, it may cause interference to the reception of the vehicle terminal. This time slot can be multiplexed outside the three-hop distance.
  • the three-hop distance in FIG. 3 is a specific or three-hop distance that satisfies certain conditions, the three-hop distance can be obtained experimentally, and therefore, in the embodiment of the present invention, The jump distance is distinguished, and the three-hop distance in FIG. 3 is called the preset three-hop distance.
  • the three-hop distance of the vehicle terminal A is the vehicle
  • the distance between the terminal A and the vehicle terminal D may be the same or different from the preset three-hop distance shown in FIG. 3, in order to distinguish between the actual vehicle terminals in the embodiment of the present invention.
  • the three-hop distance is called the actual three-hop distance and is distinguished from the preset three-hop distance.
  • the reason that the first resource management area and the first resource management area are outside the preset three-hop distance is a relatively complete D2D link resource allocation or usage, because the radio wave propagation loss occurs. Isolation, D2D link resources of vehicle terminals in a self-organizing network, can be reused in other areas separated by a preset three-hop distance (refer to MS-Aloha technology), because In this case, if the D2D resource allocation or usage in the area within the preset three-hop distance outside the first resource management area of the D2D resource control entity and the first resource management area is obtained, the first resource management area is When the internal vehicle terminal allocates the D2D link resource, based on the location information of the vehicle terminal, it is possible to avoid allocating the link resources of the vehicle terminal that collide with the D2D link resources used by other vehicle terminals or quickly collide.
  • a resource allocation method on the network side includes the following steps:
  • Step 401 The first D2D resource control entity determines related information of each vehicle terminal in the acquisition information area of the first D2D resource control entity.
  • the related information includes current location information of each vehicle terminal and used D2D link resource information, where the acquisition information area includes a first resource management area of the first D2D resource control entity and the first resource management An area within a multiplexing distance of at least a preset D2D link resource outside the area;
  • the first resource management area of the first D2D resource control entity is the resource management area of the first D2D resource control entity. To facilitate the distinction with the resource management area of the second D2D resource control entity below, the first resource management area is used here.
  • Step 402 The first D2D resource control entity receives a resource allocation request sent by a vehicle terminal in a first resource management area of the first D2D resource control entity, where the resource allocation request carries current location information of the vehicle terminal.
  • step 402 may be performed before step 401, and steps 401 and 402 may be performed simultaneously.
  • Step 403 The first D2D resource control entity allocates a D2D link resource to the vehicle terminal that sends the resource allocation request according to the current location information carried in the resource allocation request and the determined related information of each of the vehicle terminals.
  • the foregoing first D2D resource control entity may be located in a cellular base station, or may be located in a network element entity outside the cellular base station, and may also be separately set;
  • FIG. 5 is a network in which the first D2D resource control entity is located outside the cellular base station (such as an eNodeB). Schematic diagram of the structure; the first D2D resource control entity may manage D2D link resources in one cell, may also manage D2D link resources in multiple cells under the cell base station where it is located, and may also manage multiple cells D2D link resources in multiple cells under the base station; D2D chain of the first D2D resource control entity managing three cells under one cell base station (cells filled with horizontal lines in FIG. 6) as shown in FIG.
  • the cell filled with the black horizontal line is the D2D link resource management area of the first D2D resource control entity, and the area within the dotted circle is the acquisition information area of the first D2D resource control entity;
  • the black real point represents the cellular base station;
  • the size of the dotted circle in FIG. 6 should be the three-hop distance outside the management area, or even further.
  • the larger area managed by the first D2D resource control entity may include a certain number of cellular network cells according to specific situations. This is related to factors such as the capacity of the cellular network, the demand for D2D link resources, and the transmission power design of the D2D vehicle terminal.
  • the first D2D resource control entity manages only one cell.
  • the first D2D resource control entity that is first considered by the embodiment of the present invention only needs to be configured in the eNode B.
  • the time slot resource can be multiplexed according to the preset three-hop distance, when the range of the cellular network cell
  • the first D2D resource control entity manages three cells in the eNode B.
  • the dotted-line coverage area may only need the neighboring neighboring cell, it needs to obtain D2D resource allocation information of 9 cells with the neighboring cell numbers 1-9.
  • the cellular network cell is small, information on 24 cells with cell numbers 1-24 may be required. It is necessary to determine the size of the information area to be acquired according to the transmission power of the D2D network, the planning of the cellular network, and the like.
  • the first D2D resource control entity can be associated with multiple eNode Bs, so that more cells can be managed.
  • FIG. 7 is a schematic diagram showing the area distribution of the management D2D link resource shown in FIG. 5.
  • the first D2D resource management area includes seven cells filled with black solid lines in the solid line circle, and these cells are in multiple eNode Bs. .
  • the size of the solid circle cell determines the number of cells included in the acquisition information area in the dotted circle. In the case where the cell is relatively large, it is necessary to obtain information of the vehicle terminals in 12 cells; if the cell of the solid circle is smaller than the diameter of the cell For the three-hop distance of the D2D link, it is necessary to obtain information about the vehicle terminals in the 30 cells numbered 1-30. Therefore, as the first D2D resource management area expands, the area in which information is acquired will increase rapidly.
  • the size of the resource management area is related to the planning of the cellular network, the amount of data transmitted between the D2D resource control entities, and the period, and needs to be considered comprehensively during planning.
  • the acquiring information area of the first D2D resource control entity includes not only the first resource management area managed by the first D2D resource control entity but also the first multiplexing area, due to the preset D2D link resource.
  • the multiplexing distance is a distance at which resource multiplexing can be performed. Therefore, the related information of the vehicle terminal in the first multiplexing area included is significant to the reference of the D2D resource allocation of the vehicle terminal at the edge of the first resource management area, and the utilization is significant.
  • the related information of the vehicle terminal in the first multiplexing area can effectively prevent the vehicle terminal that transmits the resource allocation request from allocating D2D link resources that have a large interference with the D2D link resources used by other vehicle terminals, and the like
  • the resource allocation scheme is independent of the density and non-uniform density factors of the vehicle terminal at different locations and time periods. Therefore, the inter-region interference coordination performance is better.
  • this resource allocation scheme does not limit the use of D2D resources, , can fully utilize D2D resources.
  • the related information of each vehicle terminal in the acquisition information area may be determined according to the following steps A1 to A3:
  • Step A1 Determine each second D2D resource control entity that manages D2D link resources of the first multiplexing area
  • Step A2 performing data interaction with each of the second D2D resource control entities to obtain a second resource management area of the second D2D resource control entity and the first resource management area Relevant information of each vehicle terminal in the overlapping area of the area within the multiplexing distance of the preset D2D link resources;
  • Step A3 The related information of each vehicle terminal in each of the obtained overlapping areas and the related information of each vehicle terminal in the first resource management area are used as related information of each vehicle terminal in the acquired information area.
  • the related information further includes an identifier of a neighboring vehicle terminal of each vehicle terminal; and the resource allocation request further carries an identifier of a neighboring vehicle terminal;
  • the foregoing step 403 specifically includes: determining, within the actual three-hop distance of the current location of the vehicle terminal that sends the resource allocation request, according to the received identifier of the one-hop neighboring vehicle terminal and the determined related information of each vehicle terminal.
  • the D2D link resource used by each vehicle terminal selects one D2D link resource from the D2D link resources other than the D2D link resources used by each vehicle terminal within the determined actual three-hop distance, and selects the D2D link.
  • the road resource is allocated to the vehicle terminal that transmitted the resource allocation request.
  • the vehicle terminal B may determine that the identity of the vehicle-end terminal B of the one-hop neighboring vehicle terminal is C, and the vehicle terminal C may be referred to as a vehicle.
  • a second-hop vehicle terminal of the terminal A further determining, by the relevant information of the vehicle terminal C, the identifier D of the one-hop neighboring vehicle terminal of the vehicle terminal C, the vehicle terminal D being referred to as the (actual) three-hop vehicle of the vehicle terminal A terminal.
  • the actual three-hop distance may also have multiple distances. It is not difficult to understand that the actual vehicle terminal within the three-hop distance should be any actual The vehicle terminal within the three-hop distance, that is, the vehicle terminal that can normally communicate with the vehicle terminal A by three hops, is the vehicle terminal within the actual three-hop distance. Moreover, it can be seen from the above explanation of the preset three-hop distance that any of the above-mentioned actual three-hop distances is not greater than the preset three-hop distance.
  • the related information further includes an identifier of the actual one-hop neighboring vehicle terminal
  • each vehicle terminal within the actual three-hop distance of the current location of the vehicle terminal that transmits the resource allocation request may be determined, thereby determining the actual three D2D link resources used by each vehicle terminal within the hop distance, The problem of conflicting time slots allocated for different vehicle terminals is avoided, and the sufficiency of D2D link resource utilization and the efficiency of allocation are improved.
  • the method further includes:
  • the identifier of the vehicle terminal that transmits the resource allocation request, the used D2D link resource, the identifier of the actual one-hop neighboring vehicle terminal included in the resource allocation request, and the current location information are correspondingly stored.
  • the vehicle terminal is usually mobile, its current location information and the actual one-hop neighboring vehicle terminal are also changing, and the first D2D resource control entity needs to be for each vehicle terminal in order to accurately allocate the D2D link resources.
  • the related information is updated, so preferably, the method further includes:
  • the related information of each vehicle terminal in the determined first resource management area is updated by using the reported current location information and/or the identity of the actual one-hop neighboring vehicle terminal.
  • the vehicle terminal reports the current location information and/or the identity of the actual one-hop neighboring vehicle terminal to the network side through the D2N link.
  • each vehicle terminal needs to have a high positioning accuracy, and therefore, the vehicle terminal can obtain its own accurate position information.
  • the vehicle terminal can report its own location information to the network side according to the required transmission period.
  • the vehicle terminal also needs to report the situation of receiving the adjacent terminal data, indicating information (such as the identifier) of the neighboring vehicle terminal within the range of the terminal one hop.
  • a reporting scheme is that, in order to ensure reliability, the vehicle terminal reports complete current location information and/or actual identification information of the first-hop neighboring vehicle terminal each time; another reporting scheme is that if the transmission bandwidth is limited, The identification information of the actual one-hop neighboring vehicle terminal whose adjacent terminal changes is reported.
  • the vehicle terminal will appear during the movement. Due to the gradual approach to other vehicle terminals, the D2D link resources used by the vehicle terminal gradually cause greater interference to D2D link resources used by other vehicle terminals, or collide with D2D link resources used by other vehicle terminals.
  • the D2D link resource used by the vehicle terminal needs to be switched. In the embodiment of the present invention, the following two switching modes are specifically adopted:
  • the first type of switching switching according to the location of the vehicle terminal
  • the D2D link resource has no binding relationship with the D2N link resource, and the D2N link is only used to transmit the measurement/detection information reported by the vehicle and the D2D link resource allocation control information. Therefore, according to the location information reported by the vehicle terminal, when the distance between the vehicle terminals is smaller than the multiplexing distance of the preset D2D link resources, it means that interference will gradually occur, affecting The communication quality is triggered by the D2D resource control entity to trigger D2D link resource switching.
  • the foregoing switching according to the location of the vehicle terminal includes steps B1 to B3:
  • Step B1 When determining that the distance between the vehicle terminals using the same D2D link resource is smaller than the multiplexing distance of the preset D2D link resource according to the reported current location information, determining M vehicles using the same D2D link resource Terminal, the M is an integer greater than one;
  • Step B2 selecting M-1 vehicle terminals from the determined M vehicle terminals
  • Step B3 Sending a link resource switching command carrying the D2D link resource to the selected M-1 vehicle terminals, so that the vehicle terminal receiving the link resource switching command switches to the D2D link resource carried in the handover command.
  • the first resource management area of the first D2D resource control entity when the first resource management area of the first D2D resource control entity is small, when the distance between the two vehicle terminals is less than the multiplexing distance of the preset D2D link resources, only one vehicle terminal is located in the first resource management area. Select a new idle D2D link resource and send a handover command directly to the vehicle terminal. If the first resource management area is large and both vehicle terminals are in the first resource management area, the vehicle terminal that is closer to the regional center of the first resource management area should be preferentially replaced with the D2D link resource, so that the first resource management area The average D2D link resource usage time is longer because the length of time that the vehicle terminal that is farther away from the regional center of the first resource management area is away from the first resource management area is usually shorter.
  • the above location information based switching method is estimated to cause resource conflicts, but may affect the access
  • the quality of the letter is not strict with real-time requirements. Therefore there may be a delay of a few seconds, but there is no significant impact on performance.
  • Step C1 Receive D2D link resource information that is reported by the vehicle terminal in the first resource management area and collide;
  • Step C2 determining N vehicle terminals that collide with the used D2D link resource information according to the current location information of the vehicle terminal reporting the D2D link resource information that collides and the D2D link resource information of the collision, N is an integer greater than one;
  • Step C3 selecting N-1 vehicle terminals from the determined N vehicle terminals
  • Step C4 Sending a link resource switching command carrying the D2D link resource to the selected N-1 vehicle terminals, so that the vehicle terminal receiving the link resource switching command switches to the D2D link resource carried in the handover command.
  • Link resources
  • each vehicle terminal uses time slot resources
  • vehicle terminal A uses time slot 1
  • vehicle terminal B uses time slot 2
  • vehicle terminal C uses time slot 3
  • vehicle terminal A receives time slot 2 from two vehicle terminals.
  • Data but it does not know which specific vehicle terminals use time slot 2, but since the data of two vehicle terminals is received at the same time, it is determined that the D2D link resource of time slot 2 has collided, immediately
  • the information is reported to the first D2D resource control entity, and the first D2D resource control entity learns that the time slot 2 has collided.
  • the location information of the vehicle terminal A it is determined that the time slot 2 is used around the location of the vehicle terminal (collision occurs)
  • the vehicle terminals of the D2D link resource information are the vehicle terminal B and the vehicle terminal C.
  • the vehicle terminal When the vehicle terminal detects a collision of a certain D2D link resource (such as a time slot), it should immediately report it to the first D2D resource control entity, and the first D2D resource control entity performs handover judgment and processing to minimize the handover delay. To ensure the reliability of communication.
  • a certain D2D link resource such as a time slot
  • the switching of the above D2D link resources is performed by using signaling of the D2N link.
  • triggering D2N link resource switching does not require switching of D2D link resources.
  • the resource allocation method on the terminal side of the embodiment of the present invention is as follows. As shown in FIG. 8, the method includes the following steps:
  • Step 801 Send, to the first D2D resource control entity, a resource allocation request that carries current location information of the vehicle terminal.
  • the vehicle terminal can obtain relatively accurate position information by using a mechanism such as a GPS (Global Positioning System), and of course, the position information can be obtained by other means;
  • a mechanism such as a GPS (Global Positioning System)
  • GPS Global Positioning System
  • Step 802 Receive a D2D link resource allocated by the first D2D resource control entity, where the D2D link resource is determined by the first D2D resource control entity according to the current location information and related information of each vehicle terminal in the acquired information area. ;
  • the related information includes current location information of each vehicle terminal and D2D link resource information used
  • the acquisition information area includes a resource management area and a first multiplexing area of the first D2D resource control entity
  • the first multiplexing area includes an area within a multiplexing distance of at least a preset D2D link resource outside the resource management area.
  • the foregoing process is started at the vehicle terminal, and the vehicle terminal establishes an RRC (Radio Resource Control) connection on the D2N link, and the cellular base station performs the D2N link dedicated resource allocation for the vehicle terminal, so that the vehicle terminal A resource allocation request carrying current location information of the vehicle terminal is transmitted to the first D2D resource control entity through the allocated D2N link, and the allocated D2D link resource is received.
  • RRC Radio Resource Control
  • the related information further includes an identifier of a neighboring vehicle terminal of each vehicle terminal; the method further includes:
  • the sending by the first D2D resource control entity, the resource allocation request that carries the current location information of the vehicle terminal, including:
  • the method further includes:
  • the related information of each vehicle terminal in the first resource management area is updated.
  • the method further includes:
  • the vehicle terminal periodically reports the detected one-hop neighbor information in an incremental or complete manner, and directly triggers the event information reported by the D2N link for the event such as the D2D link resource (slot) collision;
  • the first D2D resource control entity After receiving the report information of each vehicle terminal, the first D2D resource control entity adjusts the neighbor relationship between the vehicle terminals and updates the database;
  • D2N link in the embodiment of the present invention may also be switched.
  • the D2N link switching of the vehicle terminal is consistent with the switching of the cellular network.
  • the usual decision is based on the fact that when the signal quality of the local cell is deteriorated and the signal quality of the neighboring cell is good enough, the vehicle terminal is triggered to perform handover;
  • the switching of the D2N link does not trigger the switching of the D2D link at the same time, and the link resources used on the D2D link remain unchanged.
  • the embodiment of the present invention further provides a first D2D resource control entity and a vehicle terminal.
  • the principle of the problem solved by the first D2D resource control entity and the vehicle terminal is similar to the foregoing resource allocation method.
  • the implementation of the first D2D resource control entity and the vehicle terminal reference may be made to the implementation of the foregoing method, and the repeated description is not repeated.
  • FIG. 9 is a schematic structural diagram of a first D2D resource control entity according to an embodiment of the present invention, including: a first determining module 901, a receiving module 902, and a resource allocating module 903; wherein:
  • the first determining module 901 is configured to determine related information of each vehicle terminal in the acquiring information area of the first D2D resource control entity, where the related information includes current location information of each vehicle terminal and used D2D link resource information, where
  • the acquisition information area includes the first resource management area and the first multiplexing area, where the first multiplexing area includes an area within a multiplexing distance of at least a preset D2D link resource outside the first resource management area.
  • the receiving module 902 is configured to receive a resource allocation request sent by a vehicle terminal in a first resource management area of the first D2D resource control entity, where the resource allocation request carries current location information of the vehicle terminal;
  • the resource allocation module 903 is configured to allocate a D2D link resource to the vehicle terminal that sends the resource allocation request according to the current location information carried in the resource allocation request and the determined related information of each of the vehicle terminals.
  • the first determining module 901 is specifically configured to determine a D2D chain of an area within a multiplexing distance of at least a preset D2D link resource that is outside the first resource management area of the first D2D resource control entity.
  • Each of the second D2D resource control entities of the path resource performs data interaction with each of the second D2D resource control entities to obtain a second resource management region of the second D2D resource control entity and the first multiplex region Information relating to each vehicle terminal in the overlap region; the related information of each vehicle terminal in each of the obtained overlapping regions and the related information of each vehicle terminal in the first resource management region are used as each of the acquired information regions Information about the vehicle terminal.
  • the related information further includes an identifier of a hop neighboring vehicle terminal of each vehicle terminal; and the resource allocation request further carries an identifier of a hop neighboring vehicle terminal of the vehicle terminal;
  • the resource allocation module 903 is specifically configured to: according to the received identifier of the one-hop neighboring vehicle terminal Determining the D2D link resources used by each vehicle terminal within the actual three-hop distance of the current location of the vehicle terminal transmitting the resource allocation request, and determining the three-hop distance within the determined three-hop distance
  • One D2D link resource is selected from D2D link resources other than the D2D link resource used by each vehicle terminal, and the selected D2D link resource is allocated to the vehicle terminal that transmits the resource allocation request.
  • the first D2D resource control entity further includes: a second determining module 904 and a storage module 905;
  • the second determining module 904 is configured to determine the allocated D2D link resource as a D2D link resource used by a vehicle terminal that sends the resource allocation request;
  • the storage module 905 is configured to store, in association with the identifier of the vehicle terminal that sends the resource allocation request, the used D2D link resource, the identifier of the one-hop neighboring vehicle terminal carried in the resource allocation request, and the current location information.
  • the receiving module 902 is further configured to receive current location information reported by the vehicle terminal in the first resource management area and/or an identifier of a neighboring vehicle terminal;
  • the D2D resource control entity further includes: an update module 906, configured to update related information of each vehicle terminal in the determined first resource management area by using the reported current location information and/or the identifier of the one-hop neighboring vehicle terminal.
  • the D2D resource control entity further includes: a third determining module 907, a first selecting module 908, and a first switching module 909;
  • the third determining module 907 is configured to determine to use the same D2D when determining that the distance between the vehicle terminals using the same D2D link resource is less than the multiplexing distance of the preset D2D link resource according to the reported current location information. M vehicle terminals of link resources;
  • the first selection module 908 is configured to select M-1 vehicle terminals from the determined M vehicle terminals;
  • the first switching module 909 is configured to separately send a link resource switching command carrying the D2D link resource to the selected M-1 vehicle terminals, so that the vehicle terminal that receives the link resource switching command switches to the handover command.
  • the receiving module 902 is further configured to receive the collided D2D link resource information reported by the vehicle terminal in the first resource management area;
  • the D2D resource control entity further includes: a fourth determining module 910, a second selecting module 911, and a second switching module 912;
  • the fourth determining module 910 is configured to determine, according to the current location information of the vehicle terminal that reports the D2D link resource information that collides, and the D2D link resource information that collides, determine that the used D2D link resource information collides. N vehicle terminals, the N being an integer greater than one;
  • the second selection module 911 is configured to select N-1 vehicle terminals from the determined N vehicle terminals;
  • the second switching module 912 is configured to separately send a link resource switching command carrying the D2D link resource to the selected N-1 vehicle terminals, so that the vehicle terminal that receives the link resource switching command switches to the handover command.
  • the link resource of the D2D link resource carried in the network.
  • FIG. 10 is a schematic structural diagram of a vehicle terminal according to an embodiment of the present invention, including: a sending module 101 and a receiving module 102; wherein:
  • the sending module 101 is configured to send, to the device-to-device D2D resource control entity, a resource allocation request that carries current location information of the vehicle terminal;
  • the receiving module 102 is configured to receive a D2D link resource allocated by the D2D resource control entity, where the D2D link resource is determined by the D2D resource control entity according to the current location information and related information of each vehicle terminal in the acquired information area;
  • the related information includes current location information of each vehicle terminal and D2D link resource information used
  • the acquisition information area includes a resource management area and a first multiplexing area of the D2D resource control entity, where the first The multiplexing area includes an area within a multiplexing distance of at least a preset D2D link resource outside the resource management area.
  • the related information further includes an identifier of a neighboring vehicle terminal of each vehicle terminal; the vehicle terminal further includes:
  • the determining module 103 is further configured to determine an identifier of the one-hop neighboring vehicle terminal by detecting data of the neighboring vehicle terminal;
  • the sending module 101 is specifically configured to send, to the D2D resource control entity, a resource allocation request that carries the current location information and the determined identifier of the one-hop neighboring vehicle terminal, so that the D2D resource control entity according to the current location information that is carried, The identified identifier of the one-hop neighboring vehicle terminal and the related information of each vehicle terminal allocate D2D link resources.
  • the sending module 101 is further configured to report the current location information and/or the identifier of the one-hop neighboring vehicle terminal to the D2D resource control entity, so that the D2D resource control entity is based on the reported current location information and/or The identifier of the one-hop neighboring vehicle terminal updates the related information of each vehicle terminal in the determined resource management area.
  • the sending module 101 is further configured to report, when the D2D link resource collides, the D2D link resource information that is collided to the D2D resource control entity, so that the D2D resource control entity is configured according to the D2D resource control entity.
  • the D2D link resource information of the collision occurs to transmit a link resource switching command.
  • an embodiment of the present invention further provides a resource allocation system.
  • the resource allocation system includes: any of the foregoing first D2D resource control entities 110 and at least one of the foregoing vehicle terminals 111.
  • FIG. 12 is a schematic structural diagram of a first D2D resource control entity according to an embodiment of the present invention, including a processor 1200, a transceiver 1201, and a memory 1202; and the processor 1200, the transceiver 1201, and the memory 1202 communicate through a bus interface. among them:
  • the processor 1200 is configured to read a program in the memory 1202 and perform the following processes:
  • the current location information of the vehicle terminal is carried in the resource allocation request; and the D2D is allocated to the vehicle terminal that sends the resource allocation request according to the current location information carried in the resource allocation request and the determined related information of each of the vehicle terminals.
  • the related information includes current location information of each vehicle terminal and D2D link resource information used, the acquisition information area including the first resource management area and a first multiplexing area,
  • the first multiplexing area includes an area within a multiplexing distance of at least a preset D2D link resource outside the first resource management area.
  • the transceiver 1201 is configured to receive and transmit data under the control of the processor 1200.
  • the processor 1200 is configured to read a program in the memory 1202, and further perform the following process: determining each second D2D resource control entity that manages D2D link resources of the first multiplexing area; The second D2D resource control entity performs data interaction by the transceiver 1201, and obtains information about each vehicle terminal in the coincidence area of the second resource management area of the second D2D resource control entity and the first multiplexing area; The related information of each vehicle terminal in each of the obtained overlapping areas and the related information of each vehicle terminal in the first resource management area are used as information on the respective vehicle terminals in the acquired information area.
  • the related information further includes an identifier of a hop neighboring vehicle terminal of each vehicle terminal;
  • the resource allocation request further carries an identifier of a hop neighboring vehicle terminal of the vehicle terminal;
  • the processor 1200 In reading the program in the memory 1202, the following process is also performed:
  • the D2D link resource used selects one D2D link resource from the D2D link resources except the D2D link resources used by the vehicle terminals within the determined three-hop distance, and allocates the selected D2D link resources to the transmitted and received D2D link resources.
  • the machine 1201 transmits the vehicle terminal of the resource allocation request.
  • the processor 1200 is configured to read a program in the memory 1202 and further perform the following processes:
  • the identifier of the one-hop neighboring vehicle terminal carried in the allocation request is stored corresponding to the current location information.
  • the processor 1200 is configured to read a program in the memory 1202 and further perform the following processes:
  • the processor 1200 is configured to read a program in the memory 1202 and further perform the following processes:
  • the vehicle terminal of the handover command switches to the D2D link resource carried in the handover command, and the M is an integer greater than 1.
  • the processor 1200 is configured to read a program in the memory 1202 and further perform the following processes:
  • the transceiver 1201 Receiving, by the transceiver 1201, the collided D2D link resource information reported by the vehicle terminal in the first resource management area; and the current location information of the vehicle terminal reporting the collided D2D link resource information and the collision occurrence D2D link resource information, determining N vehicle terminals in which the used D2D link resource information collides, the N being an integer greater than 1; selecting N-1 vehicle terminals from the determined N vehicle terminals; The N-1 vehicle terminals respectively transmit a link resource switching command carrying the D2D link resource, so that the vehicle terminal that receives the link resource switching command switches to the link resource of the D2D link resource carried in the handover command.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1200 and various circuits of memory represented by memory 1202.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 1201 may be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 1200 is responsible for managing the bus architecture and general processing, and the memory 1202 can store data used by the processor 1200 in performing operations.
  • FIG. 13 is a schematic structural diagram of another vehicle terminal according to an embodiment of the present invention, including a processor 1300, a transceiver 1301, a memory 1302, and a user interface 1303.
  • the processor 1300 is configured to read a program in the memory 1302 and perform the following process:
  • the resource control entity determines, according to the current location information and related information of each vehicle terminal in the acquisition information area, where: the related information includes current location information of each vehicle terminal and used D2D link resource information, and the obtaining
  • the information area includes a resource management area of the D2D resource control entity and a first multiplex area, where the first multiplex area includes an area within a multiplexing distance of at least a preset D2D link resource outside the resource management area.
  • the transceiver 1301 is configured to receive and transmit data under the control of the processor 1300.
  • the related information further includes an identifier of a neighboring vehicle terminal of each vehicle terminal;
  • the processor 1300 is configured to read a program in the memory 1302, and further perform the following process:
  • the processor 1300 is configured to read a program in the memory 1302 and further perform the following processes:
  • the transceiver 1301 And transmitting, by the transceiver 1301, the current location information and/or the identifier of the one-hop neighboring vehicle terminal to the D2D resource control entity, so that the D2D resource control entity determines the current location information according to the report and/or the identifier of the one-hop neighboring vehicle terminal.
  • the information about each vehicle terminal in the resource management area is updated.
  • the processor 1300 is configured to read a program in the memory 1302 and further perform the following processes:
  • the D2D link resource information of the collision is reported to the D2D resource control entity by the transceiver 1301, so that the D2D resource control entity sends the D2D link resource information according to the collision.
  • Link resource switching command When detecting that the D2D link resource collides, the D2D link resource information of the collision is reported to the D2D resource control entity by the transceiver 1301, so that the D2D resource control entity sends the D2D link resource information according to the collision. Link resource switching command.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1300 and various circuits of memory represented by memory 1302.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 1301 may be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the user interface 1303 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 1300 is responsible for managing the bus architecture and general processing, and the memory 1302 can store data used by the processor 1300 in performing operations.

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Abstract

本发明实施例提供了一种资源分配方法、设备及系统，用以解决现有的设备到设备D2D资源分配方案存在的不能充分利用D2D链路资源和区域间干扰协调性能较差的问题。该方法，包括：向D2D资源控制实体发送携带有该车辆终端的当前位置信息的资源分配请求；接收D2D资源控制实体分配的D2D链路资源，所述D2D链路资源是D2D资源控制实体根据所述当前位置信息和获取信息区域内的各车辆终端的相关信息确定的；其中：相关信息包括各车辆终端的当前位置信息和使用的D2D链路资源信息，获取信息区域包括所述D2D资源控制实体的资源管理区域和第一复用区域，第一复用区域包括资源管理区域外至少预设的D2D链路资源的复用距离内的区域。

Description

一种资源分配方法、设备及系统
本申请要求在2014年11月17日提交中国专利局、申请号为201410653583.8、发明名称为“一种资源分配方法、设备及系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及移动通信技术领域，尤其涉及一种资源分配方法、设备及系统。
背景技术
车辆主动安全的车联网通信系统是基于无线通信技术，获取车辆和道路的信息，通过车车、车路信息交互和共享，实现车辆和基础设施之间智能协同与配合，达到优化利用系统资源，提高道路交通安全，缓解交通拥堵的目的。
上述车联网通信系统对时延有较高的要求，现有采用短距通信的自组织网络技术虽能满足车联网通信系统的时延要求，但存在通信链路效率较低及通信功能不易扩展的问题。为此，3GPP(The 3rd Generation Partnership Project，第三代)在现有蜂窝通信系统的基础上提出了3GPP D2D(The3rd Generation Partnership Project Device-to-Device，第三代设备到设备)技术。
图1为3GPP D2D技术中包括的D2D Discovery(发现)和D2D Communication(通信)两大类功能。定义了设备和设备之间直接进行通信的链路(D2D链路)和设备和网络节点之间进行通信的链路(D2N(Device-to-Network，设备和网络节点))两种链路。将参与D2D Discovery/Communication的UE(User Equipment，用户终端)分为发送D2D Discovery/Communication消息的UE(D2D发送UE)和接收D2D发送UE发送的D2D Discovery/Communication消息的UE(D2D接收UE)。
然而，3GPP D2D技术中，目前主要以广播消息为主，系统中只有少数特定的UE作为D2D发送UE，多数UE都是D2D接收UE，无法直接应用在各UE均需要既作为发送UE又作为接收UE的车联网通信系统。
为满足车联网通信系统的需要，现有的方案是使用D2D资源控制实体管理一个或多个蜂窝小区内的车辆终端的D2D链路资源的分配，但是D2D资源控制实体管理区域间临近的边缘部分可能出现邻区域的干扰问题，针对这种情况，参考LTE(Long Term Evolution，长期演进)系统设计的区域间干扰协调的方法是一种解决方案。但是车辆终端的密度在不同地点、时段是变化的，不均匀的，影响区域间干扰协调的性能。而且，因为基于自组织的D2D链路资源与蜂窝网的链路资源并没有匹配关系，D2D资源控制实体获得的是一定区域的信息，参考LTE系统设计的区域间干扰协调的方法采用将D2D资源与蜂窝网络的资源相关联的策略会使链路资源的使用受到限制，不能充分利用D2D链路资源。
综上所述，现有的D2D资源分配方案存在区域间干扰协调性能较差和不能充分利用D2D链路资源的问题。
发明内容
本发明实施例提供一种资源分配方法、设备及系统，用以解决现有的D2D资源分配方案存在区域间干扰协调性能较差和不能充分利用D2D链路资源的问题。
基于上述问题，本发明实施例提供的一种资源分配方法、设备及系统，具体如下：
第一方面，一种资源分配方法，包括：
确定第一D2D资源控制实体的获取信息区域内的各车辆终端的相关信息，并接收第一D2D资源控制实体的第一资源管理区域内的车辆终端发送的资源分配请求，所述资源分配请求中携带有该车辆终端的当前位置信息；
根据所述资源分配请求中携带的当前位置信息和确定的各所述车辆终端 的相关信息，为发送所述资源分配请求的车辆终端分配D2D链路资源；
其中：所述相关信息包括各车辆终端的当前位置信息和使用的D2D链路资源信息，所述获取信息区域包括所述第一资源管理区域和第一复用区域，所述第一复用区域包括所述第一资源管理区域外至少预设的D2D链路资源的复用距离内的区域。
通过这种可能的实施方式，第一D2D资源控制实体的获取信息区域不仅包括其管理的第一资源管理区域，而且包括所述第一复用区域，由于该预设的D2D链路资源的复用距离是可以进行资源复用的距离，因此，利用所述第一复用区域内的车辆终端的相关信息就可以有效避免为发送资源分配请求的车辆终端分配与其它车辆终端使用的D2D链路资源存在干扰较大的D2D链路资源，并且这种资源分配方案与车辆终端在不同地点、时段是变化的且不均匀的密度因素无关，因此，区域间干扰协调性能较好；同时，由于这种资源分配方案不对D2D链路资源的使用进行限制，因此，可充分地利用D2D链路资源。
结合第一方面，在第一种可能的实现方式中，根据以下步骤确定所述获取信息区域内的各车辆终端的相关信息：
确定管理第一复用区域的D2D链路资源的各第二D2D资源控制实体；
分别与每一所述第二D2D资源控制实体进行数据交互，获得该第二D2D资源控制实体的第二资源管理区域与所述第一复用区域内的各车辆终端的相关信息；
将获得的各重合区域内的各车辆终端的相关信息和所述第一资源管理区域内的各车辆终端的相关信息作为所述获取信息区域内的各车辆终端的相关信息。
结合第一方面，在第二种可能的实施方式中，所述相关信息还包括各车辆终端的一跳邻车辆终端的标识；所述资源分配请求中还携带有该车辆终端的一跳邻车辆终端的标识；
所述根据所述资源分配请求中携带的当前位置信息和确定的各所述车辆 终端的相关信息，为发送所述资源分配请求的车辆终端分配D2D链路资源，包括：
根据接收的所述一跳邻车辆终端的标识和确定的所述各车辆终端的相关信息，确定发送所述资源分配请求的车辆终端的当前位置的三跳距离内的各车辆终端使用的D2D链路资源，从除确定的三跳距离内的各车辆终端使用的D2D链路资源外的D2D链路资源中选择一个D2D链路资源，将选择的D2D链路资源分配给发送所述资源分配请求的车辆终端。
结合第一方面的第二种可能的实现方式，在第三种可能的实现方式中，所述方法还包括：
将分配的所述D2D链路资源确定为发送所述资源分配请求的车辆终端使用的D2D链路资源；
将发送所述资源分配请求的车辆终端的标识、使用的D2D链路资源、所述资源分配请求中携带的一跳邻车辆终端的标识和当前位置信息对应存储。
结合第一方面的第三种可能的实现方式，在第四种可能的实现方式中，所述方法还包括：
接收所述第一资源管理区域内的车辆终端上报的当前位置信息和/或一跳邻车辆终端的标识；
利用上报的当前位置信息和/或一跳邻车辆终端的标识对确定的第一资源管理区域内的各车辆终端的相关信息进行更新。
结合第一方面的第四种可能的实现方式，在第五种可能的实现方式中，所述方法还包括：
在根据上报的所述当前位置信息确定使用相同D2D链路资源的车辆终端间的距离小于预设的D2D链路资源的复用距离时，确定使用相同D2D链路资源的M个车辆终端；
从确定的M个车辆终端中选择M-1个车辆终端；
向选择的M-1个车辆终端分别发送携带有D2D链路资源的链路资源切换命令，以使接收该链路资源切换命令的车辆终端切换至切换命令中携带的 D2D链路资源，所述M为大于1的整数。
结合第一方面或者第一方面的第一种可能实现方式至第五种可能的实现方式中的任一可能的实现方式，在第六种可能的实现方式中，所述方法还包括：
接收所述第一资源管理区域内的车辆终端上报的发生碰撞的D2D链路资源信息；
根据上报发生碰撞的D2D链路资源信息的车辆终端的当前位置信息和所述发生碰撞的D2D链路资源信息，确定使用的D2D链路资源信息发生碰撞的N个车辆终端，所述N为大于1的整数；
从确定的N个车辆终端中选择N-1个车辆终端；
向选择的N-1个车辆终端分别发送携带有D2D链路资源的链路资源切换命令，以使接收该链路资源切换命令的车辆终端切换至切换命令中携带的D2D链路资源的链路资源。
第二方面，一种资源分配方法，包括：
向D2D资源控制实体发送携带有该车辆终端的当前位置信息的资源分配请求；
接收D2D资源控制实体分配的D2D链路资源，所述D2D链路资源是D2D资源控制实体根据所述当前位置信息和获取信息区域内的各车辆终端的相关信息确定的；
其中：所述相关信息包括各车辆终端的当前位置信息和使用的D2D链路资源信息，所述获取信息区域包括所述D2D资源控制实体的资源管理区域和第一复用区域，所述第一复用区域包括所述资源管理区域外至少预设的D2D链路资源的复用距离内的区域。
通过这种可能的实施方式，D2D资源控制实体的获取信息区域不仅包括其管理的资源管理区域，而且包括所述第一复用区域，由于该预设的D2D链路资源的复用距离是可以进行资源复用的距离，因此，利用所述第一复用区域内的车辆终端的相关信息就可以有效避免为发送资源分配请求的车辆终端 分配与其它车辆终端使用的D2D链路资源存在干扰较大的D2D链路资源，并且这种资源分配方案与车辆终端在不同地点、时段是变化的且不均匀的密度因素无关，因此，区域间干扰协调性能较好；同时，由于这种资源分配方案不对使D2D链路资源的使用进行限制，因此，可充分地利用D2D链路资源。
结合第二方面，在第一种可能的实现方式中，所述相关信息还包括各车辆终端的一跳邻车辆终端的标识；所述方法还包括：
通过检测相邻车辆终端的数据确定其一跳邻车辆终端的标识；
所述向D2D资源控制实体发送携带有该车辆终端的当前位置信息的资源分配请求，包括：
向D2D资源控制实体发送携带有该车辆终端的当前位置信息和确定的一跳邻车辆终端的标识的资源分配请求，以使所述D2D资源控制实体根据携带的当前位置信息、确定的一跳邻车辆终端的标识和各车辆终端的相关信息分配D2D链路资源。
结合第二方面的第一种可能的实现方式，在第二种可能的实现方式中，所述方法还包括：
向D2D资源控制实体上报当前位置信息和/或一跳邻车辆终端的标识，以使所述D2D资源控制实体根据上报的当前位置信息和/或一跳邻车辆终端的标识对确定的资源管理区域内的各车辆终端的相关信息进行更新。
结合第二方面的第一种可能的实现方式，在第三种可能的实现方式中，所述方法还包括：
在检测到D2D链路资源发生碰撞时，向所述D2D资源控制实体上报发生碰撞的D2D链路资源信息，以使所述D2D资源控制实体根据发生碰撞的D2D链路资源信息发送链路资源切换命令。
第三方面，一种第一D2D资源控制实体，包括：
第一确定模块，用于确定第一D2D资源控制实体的获取信息区域内的各车辆终端的相关信息，所述相关信息包括各车辆终端的当前位置信息和使用的D2D链路资源信息，所述获取信息区域包括所述第一资源管理区域和第一 复用区域，所述第一复用区域包括所述第一资源管理区域外至少预设的D2D链路资源的复用距离内的区域；
接收模块，用于接收第一D2D资源控制实体的第一资源管理区域内的车辆终端发送的资源分配请求，所述资源分配请求中携带有该车辆终端的当前位置信息；
资源分配模块，用于根据所述资源分配请求中携带的当前位置信息和确定的各所述车辆终端的相关信息，为发送所述资源分配请求的车辆终端分配D2D链路资源。
通过这种可能的实施方式，第一D2D资源控制实体的获取信息区域不仅包括其管理的第一资源管理区域，而且包括所述第一复用区域，由于该预设的D2D链路资源的复用距离是可以进行资源复用的距离，因此，利用所述第一复用区域内的车辆终端的相关信息就可以有效避免为发送资源分配请求的车辆终端分配与其它车辆终端使用的D2D链路资源存在干扰较大的D2D链路资源，并且这种资源分配方案与车辆终端在不同地点、时段是变化的且不均匀的密度因素无关，因此，区域间干扰协调性能较好；同时，由于这种资源分配方案不对使D2D链路资源的使用进行限制，因此，可充分地利用D2D链路资源。
结合第三方面，在第一种可能的实现方式中，所述第一确定模块，具体用于确定管理所述第一复用区域的D2D链路资源的各第二D2D资源控制实体；分别与每一所述第二D2D资源控制实体进行数据交互，获得该第二D2D资源控制实体的第二资源管理区域与所述第一复用区域的重合区域内的各车辆终端的相关信息；将获得的各重合区域内的各车辆终端的相关信息和所述第一资源管理区域内的各车辆终端的相关信息作为所述获取信息区域内的各车辆终端的相关信息。
结合第三方面，在第二种可能的实施方式中，所述相关信息还包括各车辆终端的一跳邻车辆终端的标识；所述资源分配请求中还携带有该车辆终端的一跳邻车辆终端的标识；
所述资源分配模块，具体用于根据接收的所述一跳邻车辆终端的标识和确定的所述各车辆终端的相关信息，确定发送所述资源分配请求的车辆终端的当前位置的实际三跳距离内的各车辆终端使用的D2D链路资源，从除确定的三跳距离内的各车辆终端使用的D2D链路资源外的D2D链路资源中选择一个D2D链路资源，将选择的D2D链路资源分配给发送所述资源分配请求的车辆终端。
结合第三方面的第二种可能的实现方式，在第三种可能的实现方式中，所述第一D2D资源控制实体还包括：第二确定模块和存储模块；
所述第二确定模块，用于将分配的所述D2D链路资源确定为发送所述资源分配请求的车辆终端使用的D2D链路资源；
所述存储模块，用于将发送所述资源分配请求的车辆终端的标识、使用的D2D链路资源、所述资源分配请求中携带的一跳邻车辆终端的标识和当前位置信息对应存储。
结合第三方面的第三种可能的实现方式，在第四种可能的实现方式中，所述接收模块，还用于接收所述第一资源管理区域内的车辆终端上报的当前位置信息和/或一跳邻车辆终端的标识；
所述第一D2D资源控制实体还包括：更新模块，用于利用上报的当前位置信息和/或一跳邻车辆终端的标识对确定的第一资源管理区域内的各车辆终端的相关信息进行更新。
结合第三方面的第四种可能的实现方式，在第五种可能的实现方式中，所述D2D资源控制实体还包括：第三确定模块、第一选择模块和第一切换模块；
所述第三确定模块，用于在根据上报的所述当前位置信息确定使用相同D2D链路资源的车辆终端间的距离小于预设的D2D链路资源的复用距离时，确定使用相同D2D链路资源的M个车辆终端；
所述第一选择模块，用于从确定的M个车辆终端中选择M-1个车辆终端；
所述第一切换模块，用于向选择的M-1个车辆终端分别发送携带有D2D 链路资源的链路资源切换命令，以使接收该链路资源切换命令的车辆终端切换至切换命令中携带的D2D链路资源，所述M为大于1的整数。
结合第三方面或者第一方面的第一种可能的实现方式至第五种可能的实现方式中的任一可能的实现方式，在第六种可能的实现方式中，所述接收模块，还用于接收所述第一资源管理区域内的车辆终端上报的发生碰撞的D2D链路资源信息；
所述D2D资源控制实体还包括：第四确定模块、第二选择模块和第二切换模块；
所述第四确定模块，用于根据上报发生碰撞的D2D链路资源信息的车辆终端的当前位置信息和所述发生碰撞的D2D链路资源信息，确定使用的D2D链路资源信息发生碰撞的N个车辆终端，所述N为大于1的整数；
所述第二选择模块，用于从确定的N个车辆终端中选择N-1个车辆终端；
所述第二切换模块，用于向选择的N-1个车辆终端分别发送携带有D2D链路资源的链路资源切换命令，以使接收该链路资源切换命令的车辆终端切换至切换命令中携带的D2D链路资源的链路资源。
第四方面，一种车辆终端，包括：
发送模块，用于向D2D资源控制实体发送携带有该车辆终端的当前位置信息的资源分配请求；
接收模块，用于接收D2D资源控制实体分配的D2D链路资源，所述D2D链路资源是D2D资源控制实体根据所述当前位置信息和获取信息区域内的各车辆终端的相关信息确定的；
其中：所述相关信息包括各车辆终端的当前位置信息和使用的D2D链路资源信息，所述获取信息区域包括所述D2D资源控制实体的资源管理区域和第一复用区域，所述第一复用区域包括所述资源管理区域外至少预设的D2D链路资源的复用距离内的区域。
通过这种可能的实施方式，D2D资源控制实体的获取信息区域不仅包括其管理的资源管理区域，而且包括所述第一复用区域，由于该预设的D2D链 路资源的复用距离是可以进行资源复用的距离，因此，利用所述第一复用区域内的车辆终端的相关信息就可以有效避免为发送资源分配请求的车辆终端分配与其它车辆终端使用的D2D链路资源存在干扰较大的D2D链路资源，并且这种资源分配方案与车辆终端在不同地点、时段是变化的且不均匀的密度因素无关，因此，区域间干扰协调性能较好；同时，由于这种资源分配方案不对使D2D链路资源的使用进行限制，因此，可充分地利用D2D链路资源。
结合第四方面，在第一种可能的实现方式中，所述相关信息还包括各车辆终端的一跳邻车辆终端的标识；所述车辆终端还包括：
确定模块，还用于通过检测相邻车辆终端的数据确定该车辆终端的一跳邻车辆终端的标识；
所述发送模块，具体用于向D2D资源控制实体发送携带有当前位置信息和确定的一跳邻车辆终端的标识的资源分配请求，以使所述D2D资源控制实体根据携带的当前位置信息、确定的一跳邻车辆终端的标识和各车辆终端的相关信息分配D2D链路资源。
结合第四方面的第一种可能的实现方式，在第二种可能的实现方式中，所述发送模块，还用于向D2D资源控制实体上报当前位置信息和/或一跳邻车辆终端的标识，以使所述D2D资源控制实体根据上报的当前位置信息和/或一跳邻车辆终端的标识对确定的资源管理区域内的各车辆终端的相关信息进行更新。
结合第四方面的第一种可能的实现方式，在第三种可能的实现方式中，所述发送模块，还用于在检测到D2D链路资源发生碰撞时，向所述D2D资源控制实体上报发生碰撞的D2D链路资源信息，以使所述D2D资源控制实体根据发生碰撞的D2D链路资源信息发送链路资源切换命令。
第五方面，一种资源分配系统，所述资源分配系统包括：上述任一第一D2D资源控制实体和至少一个上述任一车辆终端。
通过这种可能的实施方式，第一D2D资源控制实体的获取信息区域不仅包括其管理的第一资源管理区域，而且包括所述第一复用区域，因此，利用 所述第一复用区域内的车辆终端的相关信息就可以有效避免为发送资源分配请求的车辆终端分配与其它车辆终端使用的D2D链路资源存在干扰较大的D2D链路资源，并且这种资源分配方案与车辆终端在不同地点、时段是变化的且不均匀的密度因素无关，因此，区域间干扰协调性能较好；同时，由于这种资源分配方案不对使D2D链路资源的使用进行限制，因此，可充分地利用D2D链路资源。
本发明实施例提供的网络侧设备，包括：处理器和存储器；
所述处理器，用于读取所述存储器中的程序，执行下列过程：
确定第一D2D资源控制实体的获取信息区域内的各车辆终端的相关信息，并通过收发机接收第一D2D资源控制实体的第一资源管理区域内的车辆终端发送的资源分配请求，所述资源分配请求中携带有该车辆终端的当前位置信息；根据所述资源分配请求中携带的当前位置信息和确定的各所述车辆终端的相关信息，为发送所述资源分配请求的车辆终端分配D2D链路资源；其中：所述相关信息包括各车辆终端的当前位置信息和使用的D2D链路资源信息，所述获取信息区域包括所述第一资源管理区域和第一复用区域，所述第一复用区域包括所述第一资源管理区域外至少预设的D2D链路资源的复用距离内的区域。
本发明实施例提供的车辆终端侧设备，包括：处理器和存储器；
所述处理器，用于读取所述存储器中的程序，执行下列过程：
通过收发机向第一D2D资源控制实体发送携带有该车辆终端的当前位置信息的资源分配请求；通过收发机接收D2D资源控制实体分配的D2D链路资源，所述D2D链路资源是D2D资源控制实体根据所述当前位置信息和获取信息区域内的各车辆终端的相关信息确定的；其中：所述相关信息包括各车辆终端的当前位置信息和使用的D2D链路资源信息，所述获取信息区域包括所述D2D资源控制实体的资源管理区域和第一复用区域，所述第一复用区域包括所述资源管理区域外至少预设的D2D链路资源的复用距离内的区域。
附图说明
图1为背景技术中3GPP D2D的D2D发现/通信示意图；
图2为本发明实施例提供的车联网蜂窝D2D模式网络结构示意图；
图3为本发明实施例提供的三跳距离时隙复用示意图；
图4为本发明实施例提供的网络侧的资源分配方法；
图5为本发明实施例提供第一D2D资源控制实体位于蜂窝基站之外的网络结构的示意图；
图6为本发明实施例提供的D2D链路资源管理区域分布示意图之一；
图7为本发明实施例提供的D2D链路资源管理区域分布示意图之二；
图8为本发明实施例提供的终端侧的资源分配方法的示意图；
图9为本发明实施例提供的第一D2D资源控制实体的结构示意图；
图10为本发明实施例提供的车辆终端的结构示意图；
图11为本发明实施例提供的资源分配系统示意图；
图12为本发明实施例提供的另一第一D2D资源控制实体的结构示意图；
图13为本发明实施例提供的另一车辆终端的结构示意图。
具体实施方式
本发明实施例一种资源分配方法、设备及系统，用以解决现有的D2D资源分配方案存在不能充分利用D2D链路资源和区域间干扰协调性能较差的问题。
为了清楚地说明本发明实施例的方案，下面首先分别对MS-Aloha技术的自组织车联网方案和与本发明实施例最接近的利用蜂窝基站的车联网蜂窝D2D的资源分配方法进行说明。
采用MS-Aloha技术的自组织车联网方案中，车辆终端通过检测时隙占用情况，选择空闲时隙。车辆终端发送的数据中除了有效荷载，还要包含指示时隙占用情况的一些字段，将检测到的时隙占用情况的信息在FI字段中发布出去，使周围的车辆终端都能够获得相关的时隙占用信息，避免选取附近车 辆终端已经选用的时隙。为了信息安全的目的，每一帧数据的有效荷载字段中需要为安全机制设置较长字段的资源，这会影响无线资源的使用效率。另外，如果完全依靠终端自组织方式来管理，当车辆终端较多时，自组织车联网是否能迅速高效地完成资源分配和不断的更新，也存在一定的风险。
对于利用蜂窝基站的车联网蜂窝D2D的资源分配方法，参见图2所示的车联网蜂窝D2D模式网络结构示意图。其中，D2N链路是蜂窝网络中常规的无线通信链路，车辆终端应当首先与系统建立这条链路。通过D2N链路，系统将为车辆终端分配D2D链路使用的资源，使各车辆终端间能够直接通信。
在车联网蜂窝D2D网络中，设计有D2D资源控制实体。D2D资源控制实体可以配置在蜂窝基站(如eNodeB(演进的3G移动基站))中，也可以布置在上层的其他网元中，或者布置单独的网元。图2中D2D资源控制实体只管理单一eNode B中各个小区内的车辆终端。D2D资源控制实体应可以从其在的eNodeB中获得自身资源管理区域(一个或多个小区)内的D2D链路资源中分配信息。同时，D2D车辆终端周期性地向D2D资源控制实体上报的位置信息和能够接收到周围终端的数据的时隙等信息，D2D资源控制实体根据D2D车辆终端所在位置的资源使用情况，为车辆终端分配合适的D2D链路资源。
在上述车联网蜂窝D2D的资源分配方法中，D2D资源控制实体只获得与覆盖区域相同的D2D链路资源分配和周围终端的时隙占用信息，然而，由于车联网D2D使用的链路资源与蜂窝网络的使用的链路资源并没有匹配关系，其覆盖范围与特性也有差异，如果D2D资源控制实体只获得与覆盖区域相同的D2D链路资源分配信息和周围终端的时隙占用信息，就导致分配给车辆终端的D2D链路资源与其他车辆终端使用的D2D链路资源发生冲突可能性增大，或者可能很快发生与其他车辆终端的资源冲突。而且车辆终端的密度在不同地点、时段是变化的、不均匀的，区域间干扰协调的性能仍较差。
鉴于上述车联网蜂窝D2D的资源分配方法存在的问题，本发明实施例提出了一种资源分配方法，在该方法中D2D资源控制实体可以获得较完整全面 的D2D链路资源分配或使用情况。
上述较完整全面的D2D链路资源分配或使用情况为：D2D资源控制实体的第一资源管理区域和第一复用区域内的D2D链路资源分配或使用情况，所述第一复用区域包括所述第一资源管理区域外至少预设的D2D链路资源的复用距离内的区域。
所述预设的D2D链路资源的复用距离是预先设定的，是根据车辆终端间互相能接收到信息的距离确定的，距离第一资源管理区域内的任一车辆终端预设的D2D链路资源的复用距离外的车辆终端均能够复用该车辆终端使用的链路资源。
上述预设的D2D链路资源的复用距离可以选用预设的三跳距离；
下面以图3所示的三跳距离时隙复用示意图为例对所述预设的三跳距离进行说明：
车辆终端占用链路资源1(例如时隙1)后，一跳距离内是正常接收的距离。如果该车辆终端接收自身的两跳距离内有其他车辆终端使用相同时隙，可能对该车辆终端的接收造成干扰。三跳距离外则可以复用此时隙。
由于图3中的三跳距离是一种特定的或者说是满足一定条件的三跳距离，这个三跳距离是可以通过实验获得的，因此，在本发明实施例中为了和实际情况下的三跳距离进行区分，称图3中的三跳距离为预设的三跳距离。
在实际中，如果车辆终端A的下一跳为车辆终端B，车辆终端B的下一跳为车辆C，车辆C的下一跳为车辆终端D，则车辆终端A的三跳距离即为车辆终端A和车辆终端D之间的距离，该三跳距离与图3中所示的预设的三跳距离可能相同也可能不相同，为了区分，本发明实施例中将实际中车辆终端之间的三跳距离称为是实际的三跳距离，以与上述预设的三跳距离相区分。
之所以称第一资源管理区域和所述第一资源管理区域外至少预设的三跳距离内的区域内为较完整全面的D2D链路资源分配或使用情况，是因为由于电波传播损耗而产生的隔离度，自组织网络中的车辆终端的D2D链路资源，可以相隔预设的三跳距离后的其它区域重复使用(参照MS-Aloha技术)，因 此，如果获得了D2D资源控制实体的第一资源管理区域和所述第一资源管理区域外至少预设的三跳距离内的区域内的D2D资源分配或使用情况，在为第一资源管理区域内的车辆终端分配D2D链路资源时，根据该车辆终端的位置信息，就可避免为该车辆终端分配与其他车辆终端使用的D2D链路资源发生冲突或者很快发生冲突的链路资源。
以下结合说明书附图对本发明的优选实施例进行说明，应当理解，此处所描述的优选实施例仅用于说明和解释本发明，并不用于限定本发明。并且在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
如图4所示，为本发明实施例的网络侧的资源分配方法，包括以下步骤：
步骤401：第一D2D资源控制实体确定第一D2D资源控制实体的获取信息区域内的各车辆终端的相关信息；
其中：所述相关信息包括各车辆终端的当前位置信息和使用的D2D链路资源信息，所述获取信息区域包括所述第一D2D资源控制实体的第一资源管理区域和所述第一资源管理区域外至少预设的D2D链路资源的复用距离内的区域；
第一D2D资源控制实体的第一资源管理区域即为第一D2D资源控制实体的资源管理区域，为了便于和下文的第二D2D资源控制实体的资源管理区域区分，这里用第一资源管理区域。
步骤402：第一D2D资源控制实体接收第一D2D资源控制实体的第一资源管理区域内的车辆终端发送的资源分配请求，所述资源分配请求中携带有该车辆终端的当前位置信息；
需要说明的是，上述步骤401和步骤402之间并没有必然的先后执行顺序，也可以先执行步骤402再执行步骤401，还可以同时执行步骤401和步骤402。
步骤403：第一D2D资源控制实体根据所述资源分配请求中携带的当前位置信息和确定的各所述车辆终端的相关信息，为发送所述资源分配请求的车辆终端分配D2D链路资源。
上述第一D2D资源控制实体可以位于蜂窝基站中，也可以位于蜂窝基站之外的网元实体，还可以单独设置；图5为第一D2D资源控制实体位于蜂窝基站(如eNodeB)之外的网络结构的示意图；所述第一D2D资源控制实体可以管理一个小区内的D2D链路资源，也可管理其所位于的蜂窝基站下的多个小区内的D2D链路资源，还可以管理多个蜂窝基站下的多个小区内的D2D链路资源；下面通过图6所示的管理一个蜂窝基站下的3个小区(图6中填充为横线的小区)的第一D2D资源控制实体的D2D链路资源管理区域分布示意图，以及图7所示的管理位于多个蜂窝基站下的7个小区的第一D2D资源控制实体的D2D链路资源管理区域分布示意图对第一D2D资源控制实体的D2D链路资源管理区域和获取信息区域进行说明。
图6中，以黑色横线填充的小区为第一D2D资源控制实体的D2D链路资源管理区域，虚线圆以内的区域为第一D2D资源控制实体的获取信息区域；黑色实点代表蜂窝基站；
参照MS-Aloha技术，三跳距离外的终端可以复用相同的时隙资源，因此，要求图6中虚线圆的大小应当是管理区域外三跳距离，甚至更远一些。
由于蜂窝网的D2N链路资源与D2D链路资源的分配和使用没有直接的匹配关系，因此，第一D2D资源控制实体管理的较大区域中，可以根据具体的情况包含一定数量的蜂窝网小区，这与蜂窝网小区的容量、D2D链路资源的需求、D2D车辆终端的发送功率设计等因素有关。最简单的情况是第一D2D资源控制实体只管理一个小区。本发明实施例首先考虑的第一D2D资源控制实体只需要配置在eNode B中，如果只针对一个小区，根据预设的三跳距离外时隙资源可以复用的原则，当蜂窝网小区的范围比较大时，需要获得该一个小区周围的6个小区的D2D链路资源分配信息。图6中第一D2D资源控制实体管理eNode B中的3个小区，虚线覆盖区域可能只需要外围邻小区时，需要获得外围小区编号为1-9的9个小区的D2D资源分配信息。如果蜂窝网小区较小，则可能需要小区编号为1-24的24个小区的信息。需要根据D2D网络的发送功率、蜂窝网的规划等情况来确定需要获取信息区域的大小。
如图5所示将D2D控制实体设计在eNode B之上时，第一D2D资源控制实体可以与多个eNode B相联，这样就可以管理更多的小区。
图7给出了图5所示的管理D2D链路资源的区域分布示意图，第一D2D资源管理区域包含实线圆中的7个以黑色实线填充的小区，这些小区处于多个eNode B中。实线圆的蜂窝小区的大小决定虚线圆内的获取信息区域包含的小区数目，在小区比较大的情况下，需要获得12个小区内车辆终端的信息；如果实线圆的蜂窝小区的直径小于D2D链路的三跳距离，则需要获得编号为1-30的30个小区内的车辆终端的相关信息。因此，随着第一D2D资源管理区域的扩大，获取信息的区域会快速增长。资源管理区域的大小与蜂窝网络的规划、D2D资源控制实体间传输数据量和周期等相关，需要在规划时综合考虑。
在本发明实施例的方案中，第一D2D资源控制实体的获取信息区域不仅包括其管理的第一资源管理区域，而且包括所述第一复用区域，由于该预设的D2D链路资源的复用距离是可以进行资源复用的距离，因此，包括的所述第一复用区域内的车辆终端的相关信息对第一资源管理区域边缘的车辆终端的D2D资源分配的参考意义重大，利用所述第一复用区域内的车辆终端的相关信息就可以有效避免为发送资源分配请求的车辆终端分配与其它车辆终端使用的D2D链路资源存在干扰较大的D2D链路资源，并且这种资源分配方案与车辆终端在不同地点、时段是变化的且不均匀的密度因素无关，因此，区域间干扰协调性能较好；同时，由于这种资源分配方案不对使D2D资源的使用进行限制，因此，可充分地利用D2D资源。
较佳的，可以根据以下步骤A1至步骤A3确定所述获取信息区域内的各车辆终端的相关信息：
步骤A1：确定管理所述第一复用区域的D2D链路资源的各第二D2D资源控制实体；
步骤A2：分别与每一所述第二D2D资源控制实体进行数据交互，获得该第二D2D资源控制实体的第二资源管理区域与所述第一资源管理区域外至 少预设的D2D链路资源的复用距离内的区域的重合区域内的各车辆终端的相关信息；
步骤A3：将获得的各重合区域内的各车辆终端的相关信息和所述第一资源管理区域内的各车辆终端的相关信息作为所述获取信息区域内的各车辆终端的相关信息。
较佳的，所述相关信息还包括各车辆终端的一跳邻车辆终端的标识；所述资源分配请求中还携带有一跳邻车辆终端的标识；
上述步骤403具体包括：根据接收的所述一跳邻车辆终端的标识和确定的所述各车辆终端的相关信息，确定发送所述资源分配请求的车辆终端的当前位置的实际的三跳距离内的各车辆终端使用的D2D链路资源，从除确定的实际的三跳距离内的各车辆终端使用的D2D链路资源外的D2D链路资源中选择一个D2D链路资源，将选择的D2D链路资源分配给发送所述资源分配请求的车辆终端。
在假设车辆终端A上报的一跳邻车辆终端的标识为B，则可通过车辆终端B的相关信息确定该车辆终端B一跳邻车辆终端的标识为C，该车辆终端C即可称为车辆终端A的二跳车辆终端；进一步通过车辆终端C的相关信息确定该车辆终端C的一跳邻车辆终端的标识D，该车辆终端D即可称为车辆终端A的(实际的)三跳车辆终端。
车辆终端A的实际的三跳车辆终端可能有多个，因此，上述实际的三跳距离也可能有多个距离，不难理解，上述实际的三跳距离内的车辆终端应是任一实际的三跳距离内的车辆终端，也即，只要与车辆终端A通过三跳就能进行正常通信的车辆终端均为实际的三跳距离内的车辆终端。并且，由上述对预设的三跳距离的解释可知，任一上述实际的三跳距离均不大于预设的三跳距离。
由于所述相关信息还包括实际的一跳邻车辆终端的标识，因此，可确定发送所述资源分配请求的车辆终端的当前位置的实际的三跳距离内的各车辆终端，进而确定实际的三跳距离内的各车辆终端使用的D2D链路资源，可以 避免出现为不同车辆终端分配的时隙相冲突的问题，提高了D2D链路资源利用的充分性以及分配的效率。
较佳的，为了便于第一D2D资源控制实体获取第一资源管理区域内的各车辆终端的相关信息，所述方法还包括：
将分配的所述D2D链路资源确定为发送所述资源分配请求的车辆终端使用的D2D链路资源；
将发送所述资源分配请求的车辆终端的标识、使用的D2D链路资源、所述资源分配请求包括的实际的一跳邻车辆终端的标识和当前位置信息对应存储。
考虑到车辆终端通常是在移动的，其当前位置信息和实际的一跳邻车辆终端也是在变化的，第一D2D资源控制实体为了较准确地进行D2D链路资源的分配，需要对各车辆终端的相关信息进行更新，故较佳的，所述方法还包括：
接收所述第一资源管理区域内的车辆终端上报的当前位置信息和/或实际的一跳邻车辆终端的标识；
利用上报的当前位置信息和/或实际的一跳邻车辆终端的标识对确定的第一资源管理区域内的各车辆终端的相关信息进行更新。
车辆终端通过D2N链路将当前位置信息和/或实际的一跳邻车辆终端的标识上报告给网络侧。根据车联网安全功能的要求，各车辆终端都需要有很高的定位精度，因此，车辆终端能够获得自身准确的位置信息。车辆终端可以根据需要的发送周期，向网络侧报告自身的位置信息。车辆终端还需要将接收到相邻终端数据的情况上报，表明终端一跳范围内邻车辆终端的信息(如标识)。一种上报方案是，为保证可靠性，车辆终端每次上报完整的当前位置信息和/或实际的一跳邻车辆终端的标识信息；另一种上报方案是，如果受传输带宽的限制，可以上报相邻终端发生改变的实际的一跳邻车辆终端的标识信息。
此外，考虑到车辆终端的移动性，在移动的过程中将会出现该车辆终端 因逐渐接近其它车辆终端，使得该车辆终端使用的D2D链路资源逐渐对其他车辆终端使用的D2D链路资源造成较大的干扰，或者与其他车辆终端使用的D2D链路资源发生碰撞，因此，需要对车辆终端使用的D2D链路资源进行切换，本发明实施例中，具体采用如下两种切换方式：
第一种切换方式：根据车辆终端位置进行切换
D2D链路资源没有与D2N链路资源间的绑定关系，D2N链路只是用于传递车辆上报的测量/检测信息和D2D链路资源分配控制信息。因此，本发明的D2D资源切换的一种策略是，根据车辆终端上报的位置信息，当车辆终端间的距离小于预设的D2D链路资源的复用距离时，意味着将逐渐产生干扰，影响通信质量，D2D资源控制实体判断后触发D2D链路资源切换。
具体的，上述根据车辆终端位置进行切换，包括步骤B1至步骤B3：
步骤B1：在根据上报的所述当前位置信息确定使用相同D2D链路资源的车辆终端间的距离小于预设的D2D链路资源的复用距离时，确定使用相同D2D链路资源的M个车辆终端，所述M为大于1的整数；
步骤B2：从确定的M个车辆终端中选择M-1个车辆终端；
步骤B3：向选择的M-1个车辆终端分别发送携带有D2D链路资源的链路资源切换命令，以使接收该链路资源切换命令的车辆终端切换至切换命令中携带的D2D链路资源。
此外，当第一D2D资源控制实体的第一资源管理区域较小时，一般出现两车辆终端间距离小于预设的D2D链路资源的复用距离时，只有一个车辆终端位于第一资源管理区域，选择新的空闲的D2D链路资源，直接向此车辆终端发送切换命令即可。如果第一资源管理区域较大，两个车辆终端都在第一资源管理区域，应当优先选择距离第一资源管理区域的区域中心更近的车辆终端更换D2D链路资源，使得第一资源管理区域内的D2D链路资源平均的使用时间较长，因为距离第一资源管理区域的区域中心较远的车辆终端驶离该第一资源管理区域的花费的时长通常较短。
上述基于位置信息的切换方式是估计会发生资源冲突，只是可能影响通 信质量，对实时性要求不严格。因此可能有几秒的时延，但是对性能没有大的影响。
第二种切换方式：
根据车辆终端上报的发生碰撞的D2D链路资源信息进行切换，包括步骤C1至步骤C3；
步骤C1：接收所述第一资源管理区域内的车辆终端上报的发生碰撞的D2D链路资源信息；
步骤C2：根据上报发生碰撞的D2D链路资源信息的车辆终端的当前位置信息和所述发生碰撞的D2D链路资源信息，确定使用的D2D链路资源信息发生碰撞的N个车辆终端，所述N为大于1的整数；
步骤C3：从确定的N个车辆终端中选择N-1个车辆终端；
步骤C4：向选择的N-1个车辆终端分别发送携带有D2D链路资源的链路资源切换命令，以使接收该链路资源切换命令的车辆终端切换至切换命令中携带的D2D链路资源的链路资源。
下面通过举例对上述步骤C1和C2进行说明：
假设各车辆终端使用的是时隙资源，车辆终端A使用时隙1、车辆终端B使用时隙2和车辆终端C使用时隙3；车辆终端A在时隙2接收到来自两个车辆终端的数据，但其并不知道具体是哪几个车辆终端使用时隙2，但由于同时接收到的是两个车辆终端的数据，因此，判定时隙2这一D2D链路资源发生了碰撞，立即将这一信息上报给第一D2D资源控制实体，进而第一D2D资源控制实体获知时隙2发生了碰撞，根据车辆终端A的位置信息，确定该车辆终端所在位置周围使用时隙2(发生碰撞的D2D链路资源信息)的车辆终端为车辆终端B和车辆终端C。
当车辆终端检测到某D2D链路资源(如：时隙)发生碰撞的情况，应当立即上报给第一D2D资源控制实体，第一D2D资源控制实体进行切换判断和处理，尽量减少切换的时延，保证通信的可靠性。
需要说明的是，本发明实施例的方案可以采用上述任一种切换方式进行 切换，也可以联合上述两种切换方式切换(即满足任一种方式的切换条件时均进行切换)。
上述D2D链路资源的切换时利用D2N链路的信令来完成的。车辆终端在蜂窝小区间移动，触发D2N链路资源切换时，并不需要进行D2D链路资源的切换。
至此，网络侧的资源分配方法结束。
下面说明本发明实施例的终端侧的资源分配方法，如图8所示，包括以下步骤：
步骤801：向第一D2D资源控制实体发送携带有该车辆终端的当前位置信息的资源分配请求；
车辆终端使用GPS(Global Positioning System，全球定位系统)等机制可获得比较准确的位置信息，当然也可以通过其它方式获得位置信息；
步骤802：接收第一D2D资源控制实体分配的D2D链路资源，所述D2D链路资源是第一D2D资源控制实体根据所述当前位置信息和获取信息区域内的各车辆终端的相关信息确定的；
其中：所述相关信息包括各车辆终端的当前位置信息和使用的D2D链路资源信息，所述获取信息区域包括所述第一D2D资源控制实体的资源管理区域和第一复用区域，所述第一复用区域包括所述资源管理区域外至少预设的D2D链路资源的复用距离内的区域。
需要说明的是上述过程是在车辆终端开机，车辆终端在D2N链路上建立RRC(Radio Resource Control，无线资源控制)连接，蜂窝基站为车辆终端分配D2N链路专用资源之后进行的，以便车辆终端通过分配的D2N链路向第一D2D资源控制实体发送携带有该车辆终端的当前位置信息的资源分配请求，以及接收分配的D2D链路资源。
较佳的，所述相关信息还包括各车辆终端的一跳邻车辆终端的标识；所述方法还包括：
通过检测相邻车辆终端的数据确定其一跳邻车辆终端的标识；
所述向第一D2D资源控制实体发送携带有该车辆终端的当前位置信息的资源分配请求，包括：
向第一D2D资源控制实体发送携带有当前位置信息和确定的一跳邻车辆终端的标识的资源分配请求，以使所述第一D2D资源控制实体根据携带的当前位置信息、确定的一跳邻车辆终端的标识和各车辆终端的相关信息分配D2D链路资源。
较佳的，所述方法还包括：
向第一D2D资源控制实体上报当前位置信息和/或一跳邻车辆终端的标识，以使所述第一D2D资源控制实体根据上报的当前位置信息和/或一跳邻车辆终端的标识对确定的第一资源管理区域内的各车辆终端的相关信息进行更新。
较佳的，所述方法还包括：
在检测到D2D链路资源发生碰撞时，向所述第一D2D资源控制实体上报发生碰撞的D2D链路资源信息，以使所述第一D2D资源控制实体根据发生碰撞的D2D链路资源信息发送链路资源切换命令。
具体的，车辆终端采用增量或者完整的方式将检测到的一跳邻节点信息周期性上报，针对D2D链路资源(时隙)碰撞等事件，会直接触发通过D2N链路上报事件信息；
第一D2D资源控制实体接收到各车辆终端的上报信息后，调整车辆终端间的相邻关系，更新数据库；
此外，本发明实施例中的D2N链路也可能发生切换，下面该对D2N链路切换过程进行说明：
车辆终端的D2N链路切换与蜂窝网络的切换保持一致，通常的判决依据是，当本小区信号质量变差，而邻小区信号质量足够好时，触发车辆终端进行切换；
虽然车辆终端发生了越区切换，但D2N链路的切换不会同时触发D2D链路的切换，D2D链路上使用的链路资源保持不变。
基于同一发明构思，本发明实施例还提供了一种第一D2D资源控制实体和一种车辆终端，由于该第一D2D资源控制实体和车辆终端所解决问题的原理与前述资源分配方法相似，因此第一D2D资源控制实体和车辆终端的实施可以参见前述方法的实施，重复之处不再赘述。
如图9所示，为本发明实施例的第一D2D资源控制实体的结构示意图，包括：第一确定模块901、接收模块902和资源分配模块903；其中：
第一确定模块901，用于确定第一D2D资源控制实体的获取信息区域内的各车辆终端的相关信息，所述相关信息包括各车辆终端的当前位置信息和使用的D2D链路资源信息，所述获取信息区域包括所述第一资源管理区域和第一复用区域，所述第一复用区域包括所述第一资源管理区域外至少预设的D2D链路资源的复用距离内的区域；
接收模块902，用于接收第一D2D资源控制实体的第一资源管理区域内的车辆终端发送的资源分配请求，所述资源分配请求中携带有该车辆终端的当前位置信息；
资源分配模块903，用于根据所述资源分配请求中携带的当前位置信息和确定的各所述车辆终端的相关信息，为发送所述资源分配请求的车辆终端分配D2D链路资源。
较佳的，所述第一确定模块901，具体用于确定管理所述第一D2D资源控制实体的第一资源管理区域外至少预设的D2D链路资源的复用距离内的区域的D2D链路资源的各第二D2D资源控制实体；分别与每一所述第二D2D资源控制实体进行数据交互，获得该第二D2D资源控制实体的第二资源管理区域与所述第一复用区域的重合区域内的各车辆终端的相关信息；将获得的各重合区域内的各车辆终端的相关信息和所述第一资源管理区域内的各车辆终端的相关信息作为所述获取信息区域内的各车辆终端的相关信息。
较佳的，所述相关信息还包括各车辆终端的一跳邻车辆终端的标识；所述资源分配请求中还携带有该车辆终端的一跳邻车辆终端的标识；
所述资源分配模块903，具体用于根据接收的所述一跳邻车辆终端的标识 和确定的所述各车辆终端的相关信息，确定发送所述资源分配请求的车辆终端的当前位置的实际三跳距离内的各车辆终端使用的D2D链路资源，从除确定的三跳距离内的各车辆终端使用的D2D链路资源外的D2D链路资源中选择一个D2D链路资源，将选择的D2D链路资源分配给发送所述资源分配请求的车辆终端。
较佳的，所述第一D2D资源控制实体还包括：第二确定模块904和存储模块905；
所述第二确定模块904，用于将分配的所述D2D链路资源确定为发送所述资源分配请求的车辆终端使用的D2D链路资源；
所述存储模块905，用于将发送所述资源分配请求的车辆终端的标识、使用的D2D链路资源、所述资源分配请求中携带的一跳邻车辆终端的标识和当前位置信息对应存储。
较佳的，所述接收模块902，还用于接收所述第一资源管理区域内的车辆终端上报的当前位置信息和/或一跳邻车辆终端的标识；
所述D2D资源控制实体还包括：更新模块906，用于利用上报的当前位置信息和/或一跳邻车辆终端的标识对确定的第一资源管理区域内的各车辆终端的相关信息进行更新。
较佳的，所述D2D资源控制实体还包括：第三确定模块907、第一选择模块908和第一切换模块909；
所述第三确定模块907，用于在根据上报的所述当前位置信息确定使用相同D2D链路资源的车辆终端间的距离小于预设的D2D链路资源的复用距离时，确定使用相同D2D链路资源的M个车辆终端；
所述第一选择模块908，用于从确定的M个车辆终端中选择M-1个车辆终端；
所述第一切换模块909，用于向选择的M-1个车辆终端分别发送携带有D2D链路资源的链路资源切换命令，以使接收该链路资源切换命令的车辆终端切换至切换命令中携带的D2D链路资源，所述M为大于1的整数。
较佳的，所述接收模块902，还用于接收所述第一资源管理区域内的车辆终端上报的发生碰撞的D2D链路资源信息；
所述D2D资源控制实体还包括：第四确定模块910、第二选择模块911和第二切换模块912；
所述第四确定模块910，用于根据上报发生碰撞的D2D链路资源信息的车辆终端的当前位置信息和所述发生碰撞的D2D链路资源信息，确定使用的D2D链路资源信息发生碰撞的N个车辆终端，所述N为大于1的整数；
所述第二选择模块911，用于从确定的N个车辆终端中选择N-1个车辆终端；
所述第二切换模块912，用于向选择的N-1个车辆终端分别发送携带有D2D链路资源的链路资源切换命令，以使接收该链路资源切换命令的车辆终端切换至切换命令中携带的D2D链路资源的链路资源。
如图10所示，为本发明实施例的车辆终端的结构示意图，包括：发送模块101、接收模块102；其中：
发送模块101，用于向设备到设备D2D资源控制实体发送携带有该车辆终端的当前位置信息的资源分配请求；
接收模块102，用于接收D2D资源控制实体分配的D2D链路资源，所述D2D链路资源是D2D资源控制实体根据所述当前位置信息和获取信息区域内的各车辆终端的相关信息确定的；
其中：所述相关信息包括各车辆终端的当前位置信息和使用的D2D链路资源信息，所述获取信息区域包括所述D2D资源控制实体的资源管理区域和第一复用区域，所述第一复用区域包括所述资源管理区域外至少预设的D2D链路资源的复用距离内的区域。
较佳的，所述相关信息还包括各车辆终端的一跳邻车辆终端的标识；所述车辆终端还包括：
确定模块103，还用于通过检测相邻车辆终端的数据确定其一跳邻车辆终端的标识；
所述发送模块101，具体用于向D2D资源控制实体发送携带有当前位置信息和确定的一跳邻车辆终端的标识的资源分配请求，以使所述D2D资源控制实体根据携带的当前位置信息、确定的一跳邻车辆终端的标识和各车辆终端的相关信息分配D2D链路资源。
较佳的，所述发送模块101，还用于向D2D资源控制实体上报当前位置信息和/或一跳邻车辆终端的标识，以使所述D2D资源控制实体根据上报的当前位置信息和/或一跳邻车辆终端的标识对确定的资源管理区域内的各车辆终端的相关信息进行更新。
较佳的，所述发送模块101，还用于在检测到D2D链路资源发生碰撞时，向所述D2D资源控制实体上报发生碰撞的D2D链路资源信息，以使所述D2D资源控制实体根据发生碰撞的D2D链路资源信息发送链路资源切换命令。
此外，本发明实施例还提供了一种资源分配系统，如图11所示，所述资源分配系统包括：任一上述的第一D2D资源控制实体110和至少一个任一上述的车辆终端111。
下面结合优选的硬件结构，分别对本发明实施例提供的网络侧设备的和终端侧的结构、处理方式进行说明。
参见图12，为本发明实施例提供的第一D2D资源控制实体的结构示意图，包括处理器1200、收发机1201和存储器1202；并且处理器1200、收发机1201和存储器1202通过总线接口进行通信，其中：
处理器1200，用于读取存储器1202中的程序，执行下列过程：
确定第一D2D资源控制实体的获取信息区域内的各车辆终端的相关信息，并通过收发机1201接收第一D2D资源控制实体的第一资源管理区域内的车辆终端发送的资源分配请求，所述资源分配请求中携带有该车辆终端的当前位置信息；根据所述资源分配请求中携带的当前位置信息和确定的各所述车辆终端的相关信息，为发送所述资源分配请求的车辆终端分配D2D链路资源；其中：所述相关信息包括各车辆终端的当前位置信息和使用的D2D链路资源信息，所述获取信息区域包括所述第一资源管理区域和第一复用区域，所述 第一复用区域包括所述第一资源管理区域外至少预设的D2D链路资源的复用距离内的区域。
收发机1201，用于在处理器1200的控制下接收和发送数据。
较佳的，所述处理器1200，用于读取存储器1202中的程序，还执行下列过程：确定管理第一复用区域的D2D链路资源的各第二D2D资源控制实体；分别与每一所述第二D2D资源控制实体通过收发机1201进行数据交互，获得该第二D2D资源控制实体的第二资源管理区域与所述第一复用区域的重合区域内的各车辆终端的相关信息；将获得的各重合区域内的各车辆终端的相关信息和所述第一资源管理区域内的各车辆终端的相关信息作为所述获取信息区域内的各车辆终端的相关信息。
较佳的，所述相关信息还包括各车辆终端的一跳邻车辆终端的标识；所述资源分配请求中还携带有该车辆终端的一跳邻车辆终端的标识；所述处理器1200，用于读取存储器1202中的程序，还执行下列过程：
根据通过收发机1201接收的所述一跳邻车辆终端的标识和确定的所述各车辆终端的相关信息，确定发送所述资源分配请求的车辆终端的当前位置的三跳距离内的各车辆终端使用的D2D链路资源，从除确定的三跳距离内的各车辆终端使用的D2D链路资源外的D2D链路资源中选择一个D2D链路资源，将选择的D2D链路资源分配给通过收发机1201发送所述资源分配请求的车辆终端。
较佳的，所述处理器1200，用于读取存储器1202中的程序，还执行下列过程：
将分配的所述D2D链路资源确定为发送所述资源分配请求的车辆终端使用的D2D链路资源；将发送所述资源分配请求的车辆终端的标识、使用的D2D链路资源、所述资源分配请求中携带的一跳邻车辆终端的标识和当前位置信息对应存储。
较佳的，所述处理器1200，用于读取存储器1202中的程序，还执行下列过程：
通过收发机1201接收所述第一资源管理区域内的车辆终端上报的当前位置信息和/或一跳邻车辆终端的标识；利用上报的当前位置信息和/或一跳邻车辆终端的标识对确定的第一资源管理区域内的各车辆终端的相关信息进行更新。
较佳的，所述处理器1200，用于读取存储器1202中的程序，还执行下列过程：
在根据上报的所述当前位置信息确定使用相同D2D链路资源的车辆终端间的距离小于预设的D2D链路资源的复用距离时，确定使用相同D2D链路资源的M个车辆终端；从确定的M个车辆终端中选择M-1个车辆终端；通过收发机1201向选择的M-1个车辆终端分别发送携带有D2D链路资源的链路资源切换命令，以使接收该链路资源切换命令的车辆终端切换至切换命令中携带的D2D链路资源，所述M为大于1的整数。
较佳的，所述处理器1200，用于读取存储器1202中的程序，还执行下列过程：
通过收发机1201接收所述第一资源管理区域内的车辆终端上报的发生碰撞的D2D链路资源信息；根据上报发生碰撞的D2D链路资源信息的车辆终端的当前位置信息和所述发生碰撞的D2D链路资源信息，确定使用的D2D链路资源信息发生碰撞的N个车辆终端，所述N为大于1的整数；从确定的N个车辆终端中选择N-1个车辆终端；向选择的N-1个车辆终端分别发送携带有D2D链路资源的链路资源切换命令，以使接收该链路资源切换命令的车辆终端切换至切换命令中携带的D2D链路资源的链路资源。
其中，在图12中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器1200代表的一个或多个处理器和存储器1202代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机1201可以是多个元件，即包括发送机和收发机，提供用于在传输介质上与各种其他装置通信的单元。 处理器1200负责管理总线架构和通常的处理，存储器1202可以存储处理器1200在执行操作时所使用的数据。
参见图13，为本发明实施例提供的另一种车辆终端的结构示意图，包括处理器1300、收发机1301、存储器1302和用户接口1303；其中，
处理器1300，用于读取存储器1302中的程序，执行下列过程：
通过收发机1301向第一D2D资源控制实体发送携带有该车辆终端的当前位置信息的资源分配请求；通过收发机1301接收D2D资源控制实体分配的D2D链路资源，所述D2D链路资源是D2D资源控制实体根据所述当前位置信息和获取信息区域内的各车辆终端的相关信息确定的；其中：所述相关信息包括各车辆终端的当前位置信息和使用的D2D链路资源信息，所述获取信息区域包括所述D2D资源控制实体的资源管理区域和第一复用区域，所述第一复用区域包括所述资源管理区域外至少预设的D2D链路资源的复用距离内的区域。
收发机1301，用于在处理器1300的控制下接收和发送数据。
较佳的，所述相关信息还包括各车辆终端的一跳邻车辆终端的标识；所述处理器1300，用于读取存储器1302中的程序，还执行下列过程：
通过检测相邻车辆终端的数据确定其一跳邻车辆终端的标识；通过收发机1301向第一D2D资源控制实体发送携带有当前位置信息和确定的一跳邻车辆终端的标识的资源分配请求，以使所述D2D资源控制实体根据携带的当前位置信息、确定的一跳邻车辆终端的标识和各车辆终端的相关信息分配D2D链路资源。
较佳的，所述处理器1300，用于读取存储器1302中的程序，还执行下列过程：
通过收发机1301向D2D资源控制实体上报当前位置信息和/或一跳邻车辆终端的标识，以使所述D2D资源控制实体根据上报的当前位置信息和/或一跳邻车辆终端的标识对确定的资源管理区域内的各车辆终端的相关信息进行更新。
较佳的，所述处理器1300，用于读取存储器1302中的程序，还执行下列过程：
在检测到D2D链路资源发生碰撞时，通过收发机1301向所述D2D资源控制实体上报发生碰撞的D2D链路资源信息，以使所述D2D资源控制实体根据发生碰撞的D2D链路资源信息发送链路资源切换命令。
其中，在图13中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器1300代表的一个或多个处理器和存储器1302代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机1301可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元。针对不同的用户设备，用户接口1303还可以是能够外接内接需要设备的接口，连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
处理器1300负责管理总线架构和通常的处理，存储器1302可以存储处理器1300在执行操作时所使用的数据。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (25)

  1. 一种资源分配方法，其特征在于，包括：
    确定第一设备到设备D2D资源控制实体的获取信息区域内的各车辆终端的相关信息，并接收第一D2D资源控制实体的第一资源管理区域内的车辆终端发送的资源分配请求，所述资源分配请求中携带有该车辆终端的当前位置信息；
    根据所述资源分配请求中携带的当前位置信息和确定的各所述车辆终端的相关信息，为发送所述资源分配请求的车辆终端分配D2D链路资源；
    其中：所述相关信息包括各车辆终端的当前位置信息和使用的D2D链路资源信息，所述获取信息区域包括所述第一资源管理区域和第一复用区域，所述第一复用区域包括所述第一资源管理区域外至少预设的D2D链路资源的复用距离内的区域。
  2. 如权利要求1所述的方法，其特征在于，根据以下步骤确定所述获取信息区域内的各车辆终端的相关信息：
    确定管理所述第一复用区域的D2D链路资源的各第二D2D资源控制实体；
    分别与每一所述第二D2D资源控制实体进行数据交互，获得该第二D2D资源控制实体的第二资源管理区域与所述第一复用区域的重合区域内的各车辆终端的相关信息；
    将获得的各重合区域内的各车辆终端的相关信息和所述第一资源管理区域内的各车辆终端的相关信息作为所述获取信息区域内的各车辆终端的相关信息。
  3. 如权利要求1所述的方法，其特征在于，所述相关信息还包括各车辆终端的一跳邻车辆终端的标识；所述资源分配请求中还携带有该车辆终端的一跳邻车辆终端的标识；
    所述根据所述资源分配请求中携带的当前位置信息和确定的各所述车辆终端的相关信息，为发送所述资源分配请求的车辆终端分配D2D链路资源， 包括：
    根据接收的所述一跳邻车辆终端的标识和确定的所述各车辆终端的相关信息，确定发送所述资源分配请求的车辆终端的当前位置的三跳距离内的各车辆终端使用的D2D链路资源，从除确定的三跳距离内的各车辆终端使用的D2D链路资源外的D2D链路资源中选择一个D2D链路资源，将选择的D2D链路资源分配给发送所述资源分配请求的车辆终端。
  4. 如权利要求3所述的方法，其特征在于，所述方法还包括：
    将分配的所述D2D链路资源确定为发送所述资源分配请求的车辆终端使用的D2D链路资源；
    将发送所述资源分配请求的车辆终端的标识、使用的D2D链路资源、所述资源分配请求中携带的一跳邻车辆终端的标识和当前位置信息对应存储。
  5. 如权利要求4所述的方法，其特征在于，所述方法还包括：
    接收所述第一资源管理区域内的车辆终端上报的当前位置信息和/或一跳邻车辆终端的标识；
    利用上报的当前位置信息和/或一跳邻车辆终端的标识对确定的第一资源管理区域内的各车辆终端的相关信息进行更新。
  6. 如权利要求5所述的方法，其特征在于，所述方法还包括：
    在根据上报的所述当前位置信息确定使用相同D2D链路资源的车辆终端间的距离小于预设的D2D链路资源的复用距离时，确定使用相同D2D链路资源的M个车辆终端；
    从确定的M个车辆终端中选择M-1个车辆终端；
    向选择的M-1个车辆终端分别发送携带有D2D链路资源的链路资源切换命令，以使接收该链路资源切换命令的车辆终端切换至切换命令中携带的D2D链路资源，所述M为大于1的整数。
  7. 如权利要求1至6任一所述的方法，其特征在于，所述方法还包括：
    接收所述第一资源管理区域内的车辆终端上报的发生碰撞的D2D链路资源信息；
    根据上报发生碰撞的D2D链路资源信息的车辆终端的当前位置信息和所述发生碰撞的D2D链路资源信息，确定使用的D2D链路资源信息发生碰撞的N个车辆终端，所述N为大于1的整数；
    从确定的N个车辆终端中选择N-1个车辆终端；
    向选择的N-1个车辆终端分别发送携带有D2D链路资源的链路资源切换命令，以使接收该链路资源切换命令的车辆终端切换至切换命令中携带的D2D链路资源的链路资源。
  8. 一种资源分配方法，其特征在于，包括：
    向设备到设备D2D资源控制实体发送携带有该车辆终端的当前位置信息的资源分配请求；
    接收D2D资源控制实体分配的D2D链路资源，所述D2D链路资源是D2D资源控制实体根据所述当前位置信息和获取信息区域内的各车辆终端的相关信息确定的；
    其中：所述相关信息包括各车辆终端的当前位置信息和使用的D2D链路资源信息，所述获取信息区域包括所述D2D资源控制实体的资源管理区域和第一复用区域，所述第一复用区域包括所述资源管理区域外至少预设的D2D链路资源的复用距离内的区域。
  9. 如权利要求8所述的方法，其特征在于，所述相关信息还包括各车辆终端的一跳邻车辆终端的标识；所述方法还包括：
    通过检测相邻车辆终端的数据确定其一跳邻车辆终端的标识；
    所述向D2D资源控制实体发送携带有该车辆终端的当前位置信息的资源分配请求，包括：
    向D2D资源控制实体发送携带有该车辆终端的当前位置信息和确定的一跳邻车辆终端的标识的资源分配请求，以使所述D2D资源控制实体根据携带的当前位置信息、确定的一跳邻车辆终端的标识和各车辆终端的相关信息分配D2D链路资源。
  10. 如权利要求9所述的方法，其特征在于，所述方法还包括：
    向D2D资源控制实体上报当前位置信息和/或一跳邻车辆终端的标识，以使所述D2D资源控制实体根据上报的当前位置信息和/或一跳邻车辆终端的标识对确定的资源管理区域内的各车辆终端的相关信息进行更新。
  11. 如权利要求8所述的方法，其特征在于，所述方法还包括：
    在检测到D2D链路资源发生碰撞时，向所述D2D资源控制实体上报发生碰撞的D2D链路资源信息，以使所述设备到设备D2D资源控制实体根据发生碰撞的D2D链路资源信息发送链路资源切换命令。
  12. 一种第一设备到设备D2D资源控制实体，其特征在于，包括：
    第一确定模块，用于确定第一D2D资源控制实体的获取信息区域内的各车辆终端的相关信息，所述相关信息包括各车辆终端的当前位置信息和使用的D2D链路资源信息，所述获取信息区域包括所述第一资源管理区域和第一复用区域，所述第一复用区域包括所述第一资源管理区域外至少预设的D2D链路资源的复用距离内的区域；
    接收模块，用于接收第一D2D资源控制实体的第一资源管理区域内的车辆终端发送的资源分配请求，所述资源分配请求中携带有该车辆终端的当前位置信息；
    资源分配模块，用于根据所述资源分配请求中携带的当前位置信息和确定的各所述车辆终端的相关信息，为发送所述资源分配请求的车辆终端分配D2D链路资源。
  13. 如权利要求12所述的第一D2D资源控制实体，其特征在于，所述第一确定模块，具体用于确定管理所述第二区域的D2D链路资源的各第二D2D资源控制实体；分别与每一所述第二D2D资源控制实体进行数据交互，获得该第二D2D资源控制实体的第二资源管理区域与所述第二区域的重合区域内的各车辆终端的相关信息；将获得的各重合区域内的各车辆终端的相关信息和所述第一资源管理区域内的各车辆终端的相关信息作为所述获取信息区域内的各车辆终端的相关信息。
  14. 如权利要求12所述的第一D2D资源控制实体，其特征在于，所述 相关信息还包括各车辆终端的一跳邻车辆终端的标识；所述资源分配请求中还携带有该车辆终端的一跳邻车辆终端的标识；
    所述资源分配模块，具体用于根据接收的所述一跳邻车辆终端的标识和确定的所述各车辆终端的相关信息，确定发送所述资源分配请求的车辆终端的当前位置的实际三跳距离内的各车辆终端使用的D2D链路资源，从除确定的三跳距离内的各车辆终端使用的D2D链路资源外的D2D链路资源中选择一个D2D链路资源，将选择的D2D链路资源分配给发送所述资源分配请求的车辆终端。
  15. 如权利要求14所述的第一D2D资源控制实体，其特征在于，所述第一D2D资源控制实体还包括：第二确定模块和存储模块；
    所述第二确定模块，用于将分配的所述D2D链路资源确定为发送所述资源分配请求的车辆终端使用的D2D链路资源；
    所述存储模块，用于将发送所述资源分配请求的车辆终端的标识、使用的D2D链路资源、所述资源分配请求中携带的一跳邻车辆终端的标识和当前位置信息对应存储。
  16. 如权利要求15所述的第一D2D资源控制实体，其特征在于，所述接收模块，还用于接收所述第一资源管理区域内的车辆终端上报的当前位置信息和/或一跳邻车辆终端的标识；
    所述第一D2D资源控制实体还包括：更新模块，用于利用上报的当前位置信息和/或一跳邻车辆终端的标识对确定的第一资源管理区域内的各车辆终端的相关信息进行更新。
  17. 如权利要求16所述的第一D2D资源控制实体，其特征在于，所述D2D资源控制实体还包括：第三确定模块、第一选择模块和第一切换模块；
    所述第三确定模块，用于在根据上报的所述当前位置信息确定使用相同D2D链路资源的车辆终端间的距离小于预设的D2D链路资源的复用距离时，确定使用相同D2D链路资源的M个车辆终端；
    所述第一选择模块，用于从确定的M个车辆终端中选择M-1个车辆终端；
    所述第一切换模块，用于向选择的M-1个车辆终端分别发送携带有D2D链路资源的链路资源切换命令，以使接收该链路资源切换命令的车辆终端切换至切换命令中携带的D2D链路资源，所述M为大于1的整数。
  18. 如权利要求12至17任一所述的第一D2D资源控制实体，其特征在于，所述接收模块，还用于接收所述第一资源管理区域内的车辆终端上报的发生碰撞的D2D链路资源信息；
    所述D2D资源控制实体还包括：第四确定模块、第二选择模块和第二切换模块；
    所述第四确定模块，用于根据上报发生碰撞的D2D链路资源信息的车辆终端的当前位置信息和所述发生碰撞的D2D链路资源信息，确定使用的D2D链路资源信息发生碰撞的N个车辆终端，所述N为大于1的整数；
    所述第二选择模块，用于从确定的N个车辆终端中选择N-1个车辆终端；
    所述第二切换模块，用于向选择的N-1个车辆终端分别发送携带有D2D链路资源的链路资源切换命令，以使接收该链路资源切换命令的车辆终端切换至切换命令中携带的D2D链路资源的链路资源。
  19. 一种车辆终端，其特征在于，包括：
    发送模块，用于向设备到设备D2D资源控制实体发送携带有该车辆终端的当前位置信息的资源分配请求；
    接收模块，用于接收D2D资源控制实体分配的D2D链路资源，所述D2D链路资源是D2D资源控制实体根据所述当前位置信息和获取信息区域内的各车辆终端的相关信息确定的；
    其中：所述相关信息包括各车辆终端的当前位置信息和使用的D2D链路资源信息，所述获取信息区域包括所述D2D资源控制实体的资源管理区域和第一复用区域，所述第一复用区域包括所述资源管理区域外至少预设的D2D链路资源的复用距离内的区域。
  20. 如权利要求19所述的车辆终端，其特征在于，所述相关信息还包括各车辆终端的一跳邻车辆终端的标识；所述车辆终端还包括：
    确定模块，还用于通过检测相邻车辆终端的数据确定该车辆终端的一跳邻车辆终端的标识；
    所述发送模块，具体用于向D2D资源控制实体发送携带有该车辆终端的当前位置信息和确定的一跳邻车辆终端的标识的资源分配请求，以使所述D2D资源控制实体根据携带的当前位置信息、确定的一跳邻车辆终端的标识和各车辆终端的相关信息分配D2D链路资源。
  21. 如权利要求20所述的车辆终端，其特征在于，所述发送模块，还用于向D2D资源控制实体上报当前位置信息和/或一跳邻车辆终端的标识，以使所述D2D资源控制实体根据上报的当前位置信息和/或一跳邻车辆终端的标识对确定的资源管理区域内的各车辆终端的相关信息进行更新。
  22. 如权利要求19所述的车辆终端，其特征在于，所述发送模块，还用于在检测到D2D链路资源发生碰撞时，向所述D2D资源控制实体上报的发生碰撞的D2D链路资源信息，以使所述D2D资源控制实体根据发生碰撞的D2D链路资源信息发送链路资源切换命令。
  23. 一种资源分配系统，其特征在于，所述资源分配系统包括：权利要求12～18任一所述的第一设备到设备D2D资源控制实体和至少一个权利要求19～22任一所述的车辆终端。
  24. 一种网络侧设备，其特征在于，包括：处理器、收发机和存储器；
    所述处理器，用于读取存储器中的程序，执行下列过程：
    确定第一设备到设备D2D资源控制实体的获取信息区域内的各车辆终端的相关信息，并通过收发机接收第一D2D资源控制实体的第一资源管理区域内的车辆终端发送的资源分配请求，所述资源分配请求中携带有该车辆终端的当前位置信息；根据所述资源分配请求中携带的当前位置信息和确定的各所述车辆终端的相关信息，为发送所述资源分配请求的车辆终端分配D2D链路资源；其中：所述相关信息包括各车辆终端的当前位置信息和使用的D2D链路资源信息，所述获取信息区域包括所述第一资源管理区域和第一复用区域，所述第一复用区域包括所述第一资源管理区域外至少预设的D2D链路资 源的复用距离内的区域；
    所述收发机，用于在处理器的控制下接收和发送数据。
  25. 一种车辆终端侧设备，其特征在于，包括：处理器、收发机、存储器和用户接口；
    所述处理器，用于读取存储器中的程序，执行下列过程：
    通过收发机向第一设备到设备D2D资源控制实体发送携带有该车辆终端的当前位置信息的资源分配请求；通过收发机接收D2D资源控制实体分配的D2D链路资源，所述D2D链路资源是D2D资源控制实体根据所述当前位置信息和获取信息区域内的各车辆终端的相关信息确定的；其中：所述相关信息包括各车辆终端的当前位置信息和使用的D2D链路资源信息，所述获取信息区域包括所述D2D资源控制实体的资源管理区域和第一复用区域，所述第一复用区域包括所述资源管理区域外至少预设的D2D链路资源的复用距离内的区域；
    所述收发机，用于在处理器的控制下接收和发送数据。
PCT/CN2015/094591 2014-11-17 2015-11-13 一种资源分配方法、设备及系统 WO2016078551A1 (zh)

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